TY  - BOOK
AU  - Robert van den bosch
TI  - Biological control
SN  - 0700202307
U1  - 632.9 bos/bi 
PY  - 1973///
CY  - Leighton buzzard
PB  - international textbook company ltd.
KW  - nature and scope of biological control
KW  - ecological basis for biological control
KW  - history and development
ER  -