Hymenoptera of America north of Mexico :
synoptic catalog, second supplement /
prepared by the staff and collaborators of the Hymenoptera Unit, Insect Identification and Parasite Introduction Research Branch, Entomology Research Division, Agricultural Research Service, under the direction of Karl V. Krombein and B.D. Burks.
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Item Link | Original Source |
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Full view | University of Virginia |
Full view | University of Minnesota |
Full view no.2 SUP.2 | University of Illinois at Urbana-Champaign |