TY  - BOOK
AU  - Katyal, Timmy.
AU  - Satake, M.
AU  - Kumar, Raj.
TI  - Environmental pollution
U1  - 363.736 KAT 
PY  - 1989///
CY  - New Delhi
PB  - Anmol Publications
KW  - Air
KW  - Pollution
KW  - Environmental chemistry
ER  -