Krombein, K. V.; Hurd, P. D., Jr.; Smith, D. R.; Burks, B. D. (eds.). (1979). Catalog of Hymenoptera in America North of Mexico. Volume 2: Apocrita (Aculeata). Smithsonian Institution Press, Washington, D.C., 2209 pp.
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Krombein, K. V.; Hurd, P. D., Jr.; Smith, D. R.; Burks, B. D. (eds.)
1979
Catalog of Hymenoptera in America North of Mexico. Volume 2: Apocrita (Aculeata). Smithsonian Institution Press, Washington, D.C., 2209 pp.