TY  - BOOK
AU  - TRIPATHI (A K) & PANDEY (S N).
TI  - Water pollution
SN  - 81 7024 267 3
U1  - 574.5263 TRIW 
PY  - 1990///
CY  - ND
PB  - Ashish publishing house
KW  - Water pollution
ER  -