Title: Principal sunflower bees of North America with emphasis on the Southwestern United States (Hymenoptera, Apoidea)
First published: 1980
Subjects: Insects, Bees, Insect-plant relationships, Helianthus, Sunflowers
Places: North America, New Southwest
LC classification: QL1 .S54 no. 310, QL567.1.S68 .S54 no. 310