TY  - BOOK
AU  - Ordish,George
TI  - Biological methods in crop pest control: an introductory study 
U1  - 632.96 23
PY  - 1967///
CY  - London
PB  - Constable
KW  - Biological control
KW  - Pests
N1  - Includes index and bibliography
ER  -