Act of Incorporation and By-laws ... Philadelphia, February 1915

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 43

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Proceedings of the Academy of Natural Sciences of Philadelphia

Proceedings of the Academy of Natural Sciences of Philadelphia: Volumes 68-69

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 67

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Proceedings of the Academy of Natural Sciences of Philadelphia

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Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 47

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Proceedings of the Academy of Natural Sciences of Philadelphia

Journal of the Academy of Natural Sciences of Philadelphia

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 35, Part 2

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 75

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