TY  - BOOK
AU  - Jeffries,Michael
AU  - Mills,Derek
TI  - Fresh water ecology : principles and applications / 
SN  - 8123900422
U1  - 577.6 
PY  - 1992///
CY  - New Delhi : 
PB  - C B S Publishers and Distributors , 
KW  - FRESHWATER ECOLOGY
N1  - NULL
ER  -