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

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

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 68

Journal of the Academy of Natural Sciences of Philadelphia: Volume 4

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

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 42

Proceedings of the Academy of Natural Sciences of Philadelphia: Volumes 14-15

Proceedings of the Academy of Natural Sciences of Philadelphia

Proceedings of the Academy of Natural Sciences of Philadelphia: Volumes 70-71

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 6

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

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

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 54

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

Proceedings of the Academy of Natural Sciences of Philadelphia: Volume 9