Proceedings of the Academy of Natural Sciences of Philadelphia, 1878 Author Academy of Natural Sciences of Philadelphia Title Proceedings of the Academy...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1846-1847 Author Academy of Natural Sciences of Philadelphia Title Proceedings of...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1879 Author Academy of Natural Sciences of Philadelphia Editor Edward J. Nolan, M...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1861 Author Academy of Natural Sciences of Philadelphia Title Proceedings of the Academy...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1898 Author Academy of Natural Sciences of Philadelphia Editor Edward J. Nolan, M...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1871 Author Academy of Natural Sciences of Philadelphia Title Proceedings of the Academy...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1911 Author Academy of Natural Sciences of Philadelphia Title Proceedings of the Academy...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1916 Author Academy of Natural Sciences of Philadelphia Title Proceedings of the Academy...
Proceedings of the Academy of Natural Sciences of Philadelphia, 1869 Author Academy of Natural Sciences of Philadelphia Title Proceedings of the Academy...
in DJVU-format: File:Popular Science Monthly Volume 9.djvu...