TY - BOOK TI - An index to the scientific contents of the Journal and Proceedings of the Academy of Natural Sciences of Philadelphia [1817-1910] Published in commemoration of the centenary of the academy, March 21, 1912 UR - https://www.biodiversitylibrary.org/item/84786 PB - Academy of Natural Sciences CY - Philadelphia PY - 1912 AU - Academy of Natural Sciences of Philadelphia. AU - Academy of Natural Sciences of Philadelphia. ER -