TY  - BOOK
AU  - Trivedi, P.R.
AU  - Raj, Gurdeep
TI  - Encyclopaedia of Environmental Sciences  : Environmental  Management of Fresh Water Ecology Vol 14
SN  - 8171582575
U1  - 304.203 
PY  - 1992///
CY  - New Delhi : 
PB  - Akashdeep Publishing House , 
KW  - Human Ecology
ER  -