Principal larre bees of the Southwestern United States (Hymenopera : Apoidae)
Hurd, P.D., Linsley, E.G.
Principal larre bees of the Southwestern United States (Hymenopera : Apoidae) - Washington 1975 - 74 p. - No. 193; Smithsonian Contribut .
Principal larre bees of the Southwestern United States (Hymenopera : Apoidae) - Washington 1975 - 74 p. - No. 193; Smithsonian Contribut .