TY  - BOOK
AU  - Usher, M. B.
TI  - Biological Management and Conservation : Ecological theory , Application and Planning
SN  - 412 11330 9
U1  - 574.09 US 3 B 
PY  - 1973///
CY  - London
PB  - Chapman and hall ltd
KW  - Biological Management
KW  - Conservation
ER  -