TY  - BOOK
AU  - Usher,M.B.
TI  - Biological management and conservation: ecological theory, application and planning
U1  - 577/U85b 
PY  - 1973///
CY  - London
PB  - Chapman and Hall
KW  - Ecology
KW  - Adaptation (Biology)
N1  - Appendices, bibliography and index at the end
ER  -