TY  - BOOK
AU  - Swan L A
TI  - Beneficial insects (Nature's alternatives to chemical insecticides : animal predation, parasitism, disease organisms)
U1  - 632.96 
PY  - 1964///
CY  - London
PB  - Harper and Row
KW  - Beneficial insects
KW  - Biological control
KW  - Chemical insecticides
ER  -