TY  - BOOK
AU  - Trivedi,P.R., Raj, Gurdeep.
AU  - x
TI  - Water pollution: x
SN  - 8171582796
U1  - 628.5/T841w 
PY  - 1997///
CY  - New Delhi
PB  - Akash-deep Pub.
KW  - Water - Pollution
N1  - x
ER  -