TY  - BOOK
AU  - Usher, M.B.
TI  - Biological management and conservation: ecological theory, applications and planning
U1  - 333.716 21st ed.
PY  - 1973///
CY  - London
PB  - Chapman and Hall
KW  - Biological management
KW  - Ecology
KW  - Environmental management
KW  - Environmental protection
N1  - Index: p. 386-94
ER  -