Memoirs of the National Academy of Sciences.

v. 21 (1926)

Memoirs of the National Academy of Sciences.

v. 8 (1896)

Memoirs of the National Academy of Sciences.

v. 10 (1911)

Memoirs of the National Academy of Sciences.

v. 12 (1914)

Memoirs of the National Academy of Sciences.

v. 9 (1905)

Memoirs of the National Academy of Sciences.

v. 1 (1866)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 15 (1903)

The Juglandaceae of Guatemala / Louis O. Williams and Antonio Molina R.

v.32:no.13(1970)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 30 (1919)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 3-4 (1892-1893)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 23 (1912)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 27 (1916)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 17 (1906)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 12 (1901)

Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia.

v. 1-2 (1890-1891)