TY  - BOOK
AU  - Sweetman, Harvey L.
TI  - The biological control of insects: with a chapter on weed control
U1  - 632.7 21st ed.
PY  - 1936///
CY  - Ithaca
PB  - Comstock Publishing
KW  - Insect pests-Biological control
KW  - Weeds-Control
KW  - Insects
N1  - Forword by L.O. Howard; Bibliography: pp 388-462
ER  -