TY  - BOOK
AU  - Ehrenfield, David W.
TI  - Biological conservation
T2  - Madras Biology Series
U1  - 579.8 L0 
PY  - 1970///
CY  - New York
PB  - Holt, Reinhart and Winston
KW  - David W. Ehrenfield
KW  - Biological control
ER  -