TY  - BOOK
AU  - Trivedi,P.R..
AU  - Raj ,Gurdeep   .
TI  - Environmental air pollution / 
T2  - Encyclopaedia of Environmental science ;4, 
SN  - 8171582427
U1  - 363.7392 
PY  - 1992///
CY  - New Delhi : 
PB  - Akashdeep Publishing House , 
KW  - POLLUTION
KW  - AIR-POLLUTION
N1  - NULL
ER  -