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Priority to JP7134785UpriorityCriticalpatent/JPS61187495U/ja
Publication of JPS61187495UpublicationCriticalpatent/JPS61187495U/ja
Method of and apparatus for supplementing the reading of selected passages of printed material in a book or the like by electronically reading coded indicia provided in the book at such passages to access the playing of corresponding coded tracks of pre-recorded video/audio supplemental material respectively related to the selected passages