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Proceedings of the Academy of Natural Sciences of Philadelphia v.21 (1869)
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Biological and Microscopical Department of the Academy of Natural Sciences
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Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 1--21
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
A review of the species of Plethodontidae and Desmognathidae
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By: Cope, E. D. (Edward Drinker),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 93--118
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Sexual Law in the Coniferæ
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By: Meehan, Thomas,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 121--122
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Oct. 26th
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Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 180--180
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
The Law of Development in the Flowers of Ambrosia Artemisiæfolia
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By: Meehan, Thomas,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 189--190
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Characters of Some New Hepaticæ (Mostly North American), Together with Notes on a Few Imperfectly Described Species
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Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 218--234
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Report of the Ornithological Committee
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Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 237--238
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,
Correspondence of the Academy for 1869
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Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia
Volume: 21
Date: 1869
Page Range: 245--249
Publication info: Philadelphia, Academy of Natural Sciences of Philadelphia,