Proceedings of the Academy of Natural Sciences of Philadelphia.

v.38 (1886)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.24 (1872)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.7 (1854-1855)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.64 (1912)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.63 (1911)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.67 (1915)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.1 (1841-1843)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.6 (1852-1853)

Proceedings of the Academy of Natural Sciences of Philadelphia.

Proceedings, 100th Anniversary Commemoration meeting (1912)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.12 (1860)

Proceedings of the Natural History Society of Glasgow.

v. 2 (1869-1875)

Proceedings of the Natural History Society of Glasgow.

v. 1 (1858-1869)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.61 (1909)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.41 (1889)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.49 (1897)