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- Molecular Phylogenetic Analysis of the Bees (Hymenoptera), with an Emphasis on Apidae and the Evolutionary History of Social and Cleptoparasitic Behavior
- Hymenoptera: Apoidea: Halictidae): Sociality Described for the First Time in This Bee Genus Kim Timmermann, Michael Kuhlmann
- Novitatesamerican MUSEUM PUBLISHED by the AMERICAN MUSEUM of NATURAL HISTORY CENTRAL PARK WEST at 79TH STREET, NEW YORK, N.Y
- The Bees of Colorado (Hymenoptera: Apoidea: Anthophila)
- Novitates PUBLISHED by the AMERICAN MUSEUM of NATURAL HISTORY CENTRAL PARK WEST at 79TH STREET, NEW YORK, N.Y
- Scientific Papers
- Origins, Evolution, and Diversification of Cleptoparasitic Lineages in Long-Tongued Bees
- Hymenoptera: Apoidea)
- ACTA ENTOMOLOGICA SLOVENICA LJUBLJANA, DECEMBER 2006 Vol
- American Museum Published by the American Museum of Natural History Central Park West at 79Th Street New York, N.Y
- The Bee Fauna of the Horse Mountain and Grouse Mountain Region, Humboldt County
- Journal of Melittology 10:41646