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Proceedings of the Academy of Natural Sciences of Philadelphia v.73 (1921)
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New or little-known crane-flies from the Amazonian region
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By: Alexander, Charles P. (Charles Paul),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 73
Date: 1921
Page Range: 39--103
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
South American Blattidae from the Museum National d'Histoire Naturelle, Paris, France
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By: Hebard, Morgan,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 73
Issue: 2
Date: 1921
Page Range: 193--304
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Revision of W. M. Gabb's Tertiary Mollusca of Santo Domingo
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By: Pilsbry, Henry Augustus,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 73
Date: 1921
Page Range: 305--435
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Notes on hemibranchiate and lophobranchiate fishes
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By: Fowler, Henry W.,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 73
Date: 1922
Page Range: 437--448
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,