TY  - BOOK
AU  - Jeffries,Michael
AU  - Mills,Derek
TI  - Freshwater ecology : principles and applications
SN  - 1852931272
U1  - 574.5263 
PY  - 1990///
CY  - London
PB  - Belhaven Press
KW  - Freshwater ecology
KW  - Man
KW  - influence On Nature
ER  -