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

Journal of Hymenoptera research.

v. 1-2 1992-93

Journal of Hymenoptera research.

v. 7-8 1998-99

Journal of Hymenoptera research.

v. 5-6 1996-97

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