Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 1

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 2-43

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Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 45-66

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 67

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Published in Proc. Acad. nat. Sci. Philad., in 1916, in volume 68, pages 68-84

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Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1916, in volume 68, pages 87-314

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 360-375

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 389-414

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Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 486-549

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Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1916, in volume 68, pages 614-618

Created: 2013-03-02, modified: 2013-03-02