Ribble, D.W. 1974. A revision of the bees of the genus Andrena of the Western Hemisphere subgenus Scaphandrena. American Entomological Society. 100(2): 101-189.

Ribble, D.W. 1974. A revision of the bees of the genus Andrena of the Western Hemisphere subgenus Scaphandrena. American Entomological Society. 100(2): 101-189.

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