NL7906576A - Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor. - Google Patents
Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor. Download PDFInfo
- Publication number
- NL7906576A NL7906576A NL7906576A NL7906576A NL7906576A NL 7906576 A NL7906576 A NL 7906576A NL 7906576 A NL7906576 A NL 7906576A NL 7906576 A NL7906576 A NL 7906576A NL 7906576 A NL7906576 A NL 7906576A
- Authority
- NL
- Netherlands
- Prior art keywords
- information
- areas
- record carrier
- information areas
- track
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/013—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track for discrete information, i.e. where each information unit is stored in a distinct discrete location, e.g. digital information formats within a data block or sector
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Priority Applications (19)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7906576A NL7906576A (nl) | 1979-09-03 | 1979-09-03 | Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor. |
US06/087,276 US4325135A (en) | 1979-09-03 | 1979-10-22 | Optical record carrier and apparatus for reading it |
ZA00805225A ZA805225B (en) | 1979-09-03 | 1980-08-25 | Record carrier containing information in an optically readable information structure, as well as read apparatus for said record carrier |
CA000358910A CA1150409A (en) | 1979-09-03 | 1980-08-25 | Record carrier containing information in an optically readable structure, as well as read apparatus for said record carrier |
GB8028056A GB2058434B (en) | 1979-09-03 | 1980-08-29 | Optically readable record and read apparatus therefor |
DE19803032769 DE3032769A1 (de) | 1979-09-03 | 1980-08-30 | Aufzeichnungstraeger, in dem informationen in einer optisch auslesbaren informationsstruktur angebracht ist sowie vorrichtung zum auslesen dieses aufzeichnungstraegers |
CH6582/80A CH662667A5 (de) | 1979-09-03 | 1980-09-01 | Aufzeichnungstraeger mit einer optisch auslesbaren informationsstruktur und vorrichtung zum auslesen des aufzeichnungstraegers. |
BR8005553A BR8005553A (pt) | 1979-09-03 | 1980-09-01 | Suporte de registro contendo informacoes em uma estrutura de informacoes opticamente legivel e aparelho de leitura para o dito suporte de registro |
NZ194817A NZ194817A (en) | 1979-09-03 | 1980-09-01 | Optically readable record carrier information areas of adjacent tracks differ and are readable by differently polarized read beam components |
ES494683A ES494683A0 (es) | 1979-09-03 | 1980-09-01 | Un portador de registro, que contiene informacion en una es-tructura de informacion opticamente legible |
DK371780A DK371780A (da) | 1979-09-03 | 1980-09-01 | Registreringsbaerer med information i form af en optisk aflaeselig informationsstruktur samt apparat til aflaesning af en saadan registreringsbaerer |
SE8006065A SE445960B (sv) | 1979-09-03 | 1980-09-01 | Uppteckningsberare innehallande information i en optiskt lesbar informationsstruktur samt apparat for avlesning av uppteckningsberaren |
AU61923/80A AU537557B2 (en) | 1979-09-03 | 1980-09-01 | Record carrier containing information in an optically readable information structure |
JP12125780A JPS5637835A (en) | 1979-09-03 | 1980-09-03 | Optical record medium and reader thereof |
AT0443780A AT369578B (de) | 1979-09-03 | 1980-09-03 | Aufzeichnungstraeger, in dem information in einer optisch auslesbaren informationsstruktur angebracht ist, sowie vorrichtung zum auslesen dieses aufzeichnungstraegers |
DD80223697A DD153012A5 (de) | 1979-09-03 | 1980-09-03 | Aufzeichnungstraeger,in dem information in einer optisch auslesbaren informationsstruktur angebracht ist,sowie vorrichtung zum auslesen dieses aufzeichnungstraegers |
FR8019032A FR2464532A1 (fr) | 1979-09-03 | 1980-09-03 | Porteur d'enregistrement dans lequel de l'information est enregistree dans une structure d'information lisible par voie optique, ainsi que dispositif de lecture concu a cet effet |
IT24434/80A IT1132631B (it) | 1979-09-03 | 1980-09-03 | Supporto a disco contenente informazioni in una struttura di informazione a lettura ottcia,nonche,apparecchio di letura di detto supproto a disco |
ES496774A ES8201757A1 (es) | 1979-09-03 | 1980-11-12 | Un aparato para leer un portador de registro que contiene informacion en una estructura de informacion opticamente le-gible |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7906576A NL7906576A (nl) | 1979-09-03 | 1979-09-03 | Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor. |
NL7906576 | 1979-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7906576A true NL7906576A (nl) | 1981-03-05 |
Family
ID=19833771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7906576A NL7906576A (nl) | 1979-09-03 | 1979-09-03 | Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor. |
Country Status (18)
Country | Link |
---|---|
US (1) | US4325135A (de) |
JP (1) | JPS5637835A (de) |
AT (1) | AT369578B (de) |
AU (1) | AU537557B2 (de) |
BR (1) | BR8005553A (de) |
CA (1) | CA1150409A (de) |
CH (1) | CH662667A5 (de) |
DD (1) | DD153012A5 (de) |
DE (1) | DE3032769A1 (de) |
DK (1) | DK371780A (de) |
ES (2) | ES494683A0 (de) |
FR (1) | FR2464532A1 (de) |
GB (1) | GB2058434B (de) |
IT (1) | IT1132631B (de) |
NL (1) | NL7906576A (de) |
NZ (1) | NZ194817A (de) |
SE (1) | SE445960B (de) |
ZA (1) | ZA805225B (de) |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2481501B1 (fr) * | 1980-04-25 | 1985-09-13 | Philips Nv | Porteur d'enregistrement comportant une structure d'information lisible par voie optique et dispositif pour la lecture d'un tel porteur d'enregistrement |
EP0054438B1 (de) * | 1980-12-17 | 1985-11-06 | Matsushita Electric Industrial Co., Ltd. | Optische Scheibe mit Indexmarkierung |
JPS57105828A (en) * | 1980-12-19 | 1982-07-01 | Matsushita Electric Ind Co Ltd | Optical disk recording and reproducing system |
JPS57111843A (en) * | 1980-12-27 | 1982-07-12 | Canon Inc | Vertical magnetic reading optical system |
JPS57111838A (en) * | 1980-12-27 | 1982-07-12 | Olympus Optical Co Ltd | Optical information reader |
NL8100098A (nl) * | 1981-01-12 | 1982-08-02 | Philips Nv | Registratiedrager met optisch uitleesbare informatiestruktuur. |
FR2504765A1 (fr) * | 1981-04-27 | 1982-10-29 | Thomson Csf | Dispositif d'enregistrement-lecture comprenant un support mobile d'informations du type comportant une piste pregravee |
US4385372A (en) * | 1981-05-01 | 1983-05-24 | Drexler Technology Corporation | Reflective optical data storage and laser recording media having grooved dielectric encoded prerecorded information |
JPS5862842A (ja) * | 1981-10-09 | 1983-04-14 | Matsushita Electric Ind Co Ltd | 光学的記録用円盤 |
US4443870A (en) * | 1981-10-15 | 1984-04-17 | Burroughs Corporation | Optical memory system providing track following |
US4535439A (en) * | 1981-12-01 | 1985-08-13 | Matsushita Electric Industrial Co., Ltd. | Optical having index mark and sector mark |
US4534021A (en) * | 1981-12-10 | 1985-08-06 | Discovision Associates | Angularly multiplexed optical recording medium |
US4428075A (en) * | 1981-12-21 | 1984-01-24 | Burroughs Corporation | Methods of preformatting an optical disk |
USRE32937E (en) * | 1982-03-19 | 1989-05-30 | Magnetic Peripherals, Inc. | Modulation system for optical recording |
FR2528605B1 (fr) * | 1982-06-15 | 1987-11-20 | Thomson Csf | Procede et dispositif optique de focalisation d'un faisceau d'energie lumineuse sur un plan de reference d'un support d'information ainsi que ce support |
EP0100995A3 (en) * | 1982-08-10 | 1985-10-16 | Kabushiki Kaisha Toshiba | Optical disk |
JPS5936338A (ja) * | 1982-08-24 | 1984-02-28 | Matsushita Electric Ind Co Ltd | 光デイスク記録再生方法 |
JPS5950043U (ja) * | 1982-09-24 | 1984-04-03 | オンキヨー株式会社 | 光学式ピツクアツプ |
US4861699A (en) * | 1983-03-16 | 1989-08-29 | U.S. Philips Corporation | Method of making a master disk used in making optical readable information disks |
GB8309447D0 (en) * | 1983-04-07 | 1983-05-11 | Combined Tech Corp Plc | Optical data storage |
US4578788A (en) * | 1983-06-02 | 1986-03-25 | International Business Machines Corporation | High performance optical storage medium with separate mechanical servo tracks embedded within the medium |
JPS60234232A (ja) * | 1984-05-07 | 1985-11-20 | Matsushita Electric Ind Co Ltd | 光デイスクおよびそのトラツキング方法 |
JPH07107744B2 (ja) * | 1984-05-16 | 1995-11-15 | 松下電器産業株式会社 | 光ディスクの再生方法 |
US4674070A (en) * | 1984-08-11 | 1987-06-16 | Victor Company Of Japan, Ltd. | Optical type disc with V-shaped groove and optical type reproducing apparatus therefor |
US4858218A (en) * | 1984-09-12 | 1989-08-15 | Nikon Corporation | Optical recording medium and reproducing apparatus |
NL8500152A (nl) * | 1985-01-22 | 1986-08-18 | Philips Nv | Registratiedragerlichaam voorzien van vooraf aangebrachte en optisch detekteerbare servospoorgedeelten en sektoradressen. |
NL8500153A (nl) * | 1985-01-22 | 1986-08-18 | Philips Nv | Registratiedragerlichaam voorzien van een reliefstruktuur van optisch detekteerbare servospoorgedeelten en sektoradressen en inrichting voor het aanbrengen van deze struktuur. |
US4706235A (en) * | 1985-01-25 | 1987-11-10 | Storage Technology Partners 11 | Differential track recording |
JPH0746429B2 (ja) * | 1985-06-21 | 1995-05-17 | オリンパス光学工業株式会社 | 光学式記録再生装置 |
US4703465A (en) * | 1985-12-04 | 1987-10-27 | 1K Entertainment Center Ltd. | Method and apparatus for producing an audio magnetic tape recording from a preselected music library |
US4860273A (en) * | 1986-07-31 | 1989-08-22 | Fuji Photo Film Co., Ltd. | Method of recording information and information recording medium employed for the same |
JPS63104225A (ja) * | 1986-10-21 | 1988-05-09 | Csk Corp | 光記録媒体のトラツキング方式 |
US4819218A (en) * | 1986-12-19 | 1989-04-04 | Eastman Kodak Company | Quasi-constant linear-velocity disk having corresponding radii of adjacent annular zones related by a rational number for distributing prerecorded indicia to form a coherent write clock signal |
US4851931A (en) * | 1987-02-20 | 1989-07-25 | 1K Music International Ltd. | Method and apparatus for producing an audio magnetic tape recording at high speed from a preselected music library |
KR0145722B1 (ko) * | 1987-07-07 | 1998-10-15 | 나가이 아쯔시 | 광정보기록매체 및 그 제조방법 |
JP2735220B2 (ja) * | 1987-12-02 | 1998-04-02 | 株式会社日立製作所 | 非点収差を有する光束を用いた焦点ずれ検出方法及び光ディスク装置 |
US5309416A (en) * | 1988-04-26 | 1994-05-03 | Canon Kabushiki Kaisha | Method and apparatus for initializing intermediate region between tracks on magnetooptical recording medium |
JP2612329B2 (ja) * | 1988-12-27 | 1997-05-21 | シャープ株式会社 | 光メモリ素子並びに光メモリ再生装置 |
EP0376678B1 (de) * | 1988-12-28 | 1995-03-01 | Canon Kabushiki Kaisha | Informationsaufzeichnungsträger |
JPH03142717A (ja) * | 1989-10-27 | 1991-06-18 | Ricoh Co Ltd | 光ディスク |
FR2661769B1 (fr) * | 1990-05-02 | 1995-04-21 | Thomson Csf | Systeme d'enregistrement optique de donnees sur disque, et procedes de lecture et ecriture correspondants. |
JP3063805B2 (ja) * | 1991-02-25 | 2000-07-12 | オリンパス光学工業株式会社 | 光学式情報再生装置および記録媒体 |
JPH0589477A (ja) * | 1991-09-27 | 1993-04-09 | Pioneer Electron Corp | 光デイスク |
JP3067873B2 (ja) * | 1992-01-20 | 2000-07-24 | パイオニア株式会社 | 光ディスク及び光ディスク再生装置 |
JP3002318B2 (ja) * | 1992-01-20 | 2000-01-24 | パイオニア株式会社 | 光ディスク及び光ディスク再生装置 |
JPH0676387A (ja) * | 1992-08-31 | 1994-03-18 | Pioneer Electron Corp | 光ディスクおよび光ディスク再生装置 |
US5748592A (en) * | 1996-02-07 | 1998-05-05 | Matsushita Electric Industrial Co., Ltd. | Disk drive apparatus and disk storage medium for high density recording |
US7239602B2 (en) * | 1998-08-27 | 2007-07-03 | Ricoh Company, Ltd. | Optical information recording medium with a partition wall between an information tracks groove and a preformat pit encoding information therefor |
US7352681B1 (en) * | 1998-10-26 | 2008-04-01 | Sony Corporation | Optical disc for data storage with invisible tracks and method of making same |
US6549511B1 (en) * | 1999-02-24 | 2003-04-15 | Hewlett Packard Development Company, L.P. | Optical disk medium having features for radial tilt detection and apparatus for measuring radial tilt |
AU2001290298A1 (en) * | 2000-10-03 | 2002-04-15 | Matsushita Electric Industrial Co., Ltd. | Multi-layer optical disk and method of producing mult-layer optical disk |
US6940805B2 (en) * | 2001-10-23 | 2005-09-06 | Dragsholm Wireless Holdings Llc | Methods and apparatus for cross-talk and jitter reduction in multi-beam optical disks |
WO2003050802A2 (en) * | 2001-12-12 | 2003-06-19 | Koninklijke Philips Electronics N.V. | Accommodating additional data on an optical data carrier disk |
EP1658608B1 (de) * | 2003-08-20 | 2007-10-31 | Koninklijke Philips Electronics N.V. | Optischer aufzeichnungsträger |
US20050063293A1 (en) * | 2003-09-22 | 2005-03-24 | Smolovich Anatoly M. | Optical disk with tracking grooves similar to blazed grating |
WO2006056947A1 (en) * | 2004-11-29 | 2006-06-01 | Koninklijke Philips Electronics N.V. | Two-dimensional encoded optical recording medium comprising elliptical data bits |
JP2006252743A (ja) * | 2005-03-08 | 2006-09-21 | Qinghua Univ | マルチレベル読み出し専用光ディスク及びその製造方法 |
EP2172934A1 (de) * | 2008-10-06 | 2010-04-07 | Thomson Licensing | Optisches Speichermedium mit Marken mit verschiedener Ausrichtung und entsprechende Vorrichtung zum Lesen von Daten |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3314052A (en) * | 1963-04-12 | 1967-04-11 | Ibm | Light modulation system |
US3348217A (en) * | 1964-05-01 | 1967-10-17 | Alvin A Snaper | Electro-optical computer or data processing system using superimposed polarizers |
US3855426A (en) * | 1971-03-11 | 1974-12-17 | Philips Corp | Video disc recording and optical playback system therefor |
US4084185A (en) * | 1974-02-12 | 1978-04-11 | U.S. Philips Corporation | Record carrier on which information is stored in an optically readable structure |
DE2524473A1 (de) * | 1975-06-03 | 1976-12-23 | Ted Bildplatten | Verfahren und einrichtung zum aufzeichnen von signalen |
DE2634243A1 (de) * | 1976-07-30 | 1978-02-02 | Bosch Gmbh Robert | System zur aufzeichnung und/oder wiedergabe von signalen mittels strahlen |
US4161752A (en) * | 1977-06-28 | 1979-07-17 | International Business Machines Corporation | High density video disk having two pit depths |
US4209793A (en) * | 1977-12-17 | 1980-06-24 | Victor Company Of Japan, Limited | Apparatus for optically recording signals on a recording medium |
NL187413C (nl) * | 1978-03-16 | 1991-09-16 | Philips Nv | Registratiedragerlichaam, ingeschreven registratiedrager, werkwijze voor het inschrijven van het registratiedragerlichaam en inrichting voor het uitvoeren van de werkwijze en voor het uitlezen van een ingeschreven registratiedrager. |
NL7803517A (nl) * | 1978-04-03 | 1979-10-05 | Philips Nv | Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen. |
NL7810462A (nl) * | 1978-10-19 | 1980-04-22 | Philips Nv | Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare stralingsreflekterende informatiestruktuur |
-
1979
- 1979-09-03 NL NL7906576A patent/NL7906576A/nl not_active Application Discontinuation
- 1979-10-22 US US06/087,276 patent/US4325135A/en not_active Expired - Lifetime
-
1980
- 1980-08-25 ZA ZA00805225A patent/ZA805225B/xx unknown
- 1980-08-25 CA CA000358910A patent/CA1150409A/en not_active Expired
- 1980-08-29 GB GB8028056A patent/GB2058434B/en not_active Expired
- 1980-08-30 DE DE19803032769 patent/DE3032769A1/de active Granted
- 1980-09-01 CH CH6582/80A patent/CH662667A5/de not_active IP Right Cessation
- 1980-09-01 DK DK371780A patent/DK371780A/da not_active Application Discontinuation
- 1980-09-01 BR BR8005553A patent/BR8005553A/pt unknown
- 1980-09-01 ES ES494683A patent/ES494683A0/es active Granted
- 1980-09-01 SE SE8006065A patent/SE445960B/sv not_active IP Right Cessation
- 1980-09-01 NZ NZ194817A patent/NZ194817A/xx unknown
- 1980-09-01 AU AU61923/80A patent/AU537557B2/en not_active Ceased
- 1980-09-03 DD DD80223697A patent/DD153012A5/de unknown
- 1980-09-03 JP JP12125780A patent/JPS5637835A/ja active Granted
- 1980-09-03 IT IT24434/80A patent/IT1132631B/it active
- 1980-09-03 FR FR8019032A patent/FR2464532A1/fr active Granted
- 1980-09-03 AT AT0443780A patent/AT369578B/de active
- 1980-11-12 ES ES496774A patent/ES8201757A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ZA805225B (en) | 1982-04-28 |
FR2464532A1 (fr) | 1981-03-06 |
SE445960B (sv) | 1986-07-28 |
SE8006065L (sv) | 1981-03-04 |
DD153012A5 (de) | 1981-12-16 |
GB2058434B (en) | 1983-07-27 |
ES8105108A1 (es) | 1981-05-16 |
FR2464532B1 (de) | 1984-01-13 |
IT8024434A0 (it) | 1980-09-03 |
AU6192380A (en) | 1981-03-12 |
CH662667A5 (de) | 1987-10-15 |
AU537557B2 (en) | 1984-06-28 |
ES496774A0 (es) | 1981-12-16 |
ATA443780A (de) | 1982-05-15 |
DK371780A (da) | 1981-03-04 |
IT1132631B (it) | 1986-07-02 |
BR8005553A (pt) | 1981-03-17 |
ES8201757A1 (es) | 1981-12-16 |
AT369578B (de) | 1983-01-10 |
US4325135A (en) | 1982-04-13 |
JPS5637835A (en) | 1981-04-11 |
DE3032769C2 (de) | 1989-09-14 |
JPH0121543B2 (de) | 1989-04-21 |
GB2058434A (en) | 1981-04-08 |
CA1150409A (en) | 1983-07-19 |
DE3032769A1 (de) | 1981-04-16 |
NZ194817A (en) | 1983-09-02 |
ES494683A0 (es) | 1981-05-16 |
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