Bibliography

Fox, W. J. 1913. Dates of Publication, In E. J. Nolan (ed.), An index to the scientific contents of the Journal and Proceedings of the Academy of Natural Sciences of Philadelphia 1812–1912. Published in commemoration of the centenary of the Academy, March 21, 1912. Proceedings of the Academy of Natural Sciences of Philadelphia Index, 1812–1912: vii–xiv.