Proceedings of the Biological Society of Washington.

v. 7 (1892)

Proceedings of the Biological Society of Washington.

v. 14 (1901)

Proceedings of the Biological Society of Washington.

v. 16 (1903)

Proceedings of the Biological Society of Washington.

v. 6 (1890-1891)

Proceedings of the Biological Society of Washington.

v. 5 (1888-1890)

Proceedings of the Biological Society of Washington.

v. 13 (1899-1900)

Proceedings of the Biological Society of Washington.

v. 15 (1902)

Proceedings of the Biological Society of Washington.

v. 4 (1886-1888)

Proceedings of the Biological Society of Washington.

v. 12 (1898)

Proceedings of the Biological Society of Washington.

v. 11 (1897)

Catalog of hymenoptera in America north of Mexico / prepared cooperatively by specialists on the various groups of Hymenoptera under the direction of Karl V. Krombein ... [et al.].

vol. 1

Catalog of hymenoptera in America north of Mexico / prepared cooperatively by specialists on the various groups of Hymenoptera under the direction of Karl V. Krombein ... [et al.].

vol. 3

Catalog of hymenoptera in America north of Mexico / prepared cooperatively by specialists on the various groups of Hymenoptera under the direction of Karl V. Krombein ... [et al.].

vol. 2

Carnegie Institution of Washington publication.

no.248,v.1 (1919)

Carnegie Institution of Washington publication.

no.248,v.2 (1920)