Edwards
1943
Comparative occupation statistics for the United States, 1870 to 1940
DE1350396U
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DE1385464U
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DE1376722U
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DE1466312U
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DE1287724U
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DE1321477U
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DE1360819U
(cg-RX-API-DMAC10.html )
DE1310347U
(cg-RX-API-DMAC10.html )
Shramko et al.
2018
Vorona SP
DE1295510U
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DE1300826U
(cg-RX-API-DMAC10.html )
DE1383679U
(cg-RX-API-DMAC10.html )
DE1378716U
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Rettger
1896
A Possible Relation of the Academy of Science to the Teachers of Biology in Our Secondary School
DE1374405U
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DE1354224U
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DE1341808U
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