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v.19 (1867):[Lacks:pg.126-127]

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.48 (1896)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.27 (1875)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.17 (1865)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.13 (1861)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.39 (1887)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.74 (1922)

Proceedings of the Academy of Natural Sciences of Philadelphia.

v.26 (1874)

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)