TY  - BOOK
AU  - Stephen, W.P. 
AU  - Bohart, G.E. Torchio, P.F.
TI  - The biology and external morphology of bees with a synopsis of the genera of Nortwestern America
PY  - 1969///
CY  - Corvallis
PB  - Agricultural Experiment Station, Oregon State University
KW  - Bees
ER  -