TY  - BOOK
AU  - Trivedi, P. R. & Raj, Gurdeep
TI  - Encyclopaedia of environmental sciences ; Vol-14: Environmental management of fresh water ecology
SN  - 81-7158-279-6 (set)
U1  - R551 
PY  - 1992///
CY  - New Delhi
PB  - Akashdeep Publishing House
ER  -