TY - BOOK AU - Hurd, Paul D. CN - QL1 CN - QL1 CN - QL567.1.S68 CY - Washington : DA - 1980. ID - 24818 KW - Bees KW - Bees KW - Helianthus. KW - Insect-plant relationships. KW - Insects KW - Insects PB - Smithsonian Institution Press, PP - Washington : PY - 1980. T1 - Principal sunflower bees of North America with emphasis on the Southwestern United States (Hymenoptera, Apoidea) / TI - Principal sunflower bees of North America with emphasis on the Southwestern United States (Hymenoptera, Apoidea) / ER -