TY  - BOOK
AU  - Krombein,Karl V., x
AU  - x
TI  - Trap-nesting wasps and bees ; : life histories, nests, and  associates
SN  - x       
U1  - 591/KRT 
PY  - 1967///
CY  - Washington
PB  - Smithsonian Press
KW  - Zoology
ER  -