Krombein, Karl V., Hammons, R. O., and Leuck, D. B. 1963. "Some Bees (Apoidea) Associated with Peanut Flowering." Journal of Economic Entomology, 56 905.
Melittidae (Hymenoptera, Apoidea, Anthophila) of Poland : their biodiversity and biology / Waldemar Celary Smithsonian Libraries and Archives ...
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