TY  - BOOK
AU  - Chhatwal, G. R.
TI  - Encyclopedia of Environmental Pollution and Its Control 2
SN  - 8170412439
U1  - 628.503 
PY  - 1989///
CY  - New Delhi : 
PB  - Anmol Publications, 
KW  - Environmental Engineering Encyclopedias
N1  - NN; v. 2. Water Pollution
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/81-7041-243-9.pdf
ER  -