TY  - BOOK
AU  - Nicol,Hugh
TI  - Biological control of insects
U1  - 632.96 
PY  - 1943///
CY  - New York
PB  - Penguin Books
KW  - Agricultural pests
KW  - Biological control
KW  - Insect pests
KW  - Biological pest control agents
KW  - Insects, Injurous and benificial
ER  -