TY  - BOOK
AU  - Hurd,Paul D.(Paul David)
AU  - Linsley,E.Gorton
AU  - 
TI  - Principal sunflower bees of North America with emphasis on the southwestern United States(Hymenoptera: Apoidea) 
PY  - 1980///
CY  - Washington
PB  - Smithsonian Institution Press
KW  - Bees
KW  - United States
KW  - Helianthus
ER  -