TY  - BOOK
AU  - Trivedi, P. R.
AU  - Gurdeep Raj
TI  - ENVIRONMENTAL AIR POLLUTION
SN  - 8171582427
U1  - 628.532 
PY  - 1992///
CY  - Delhi
PB  - Akashdeep Pub.
KW  - Air -- Pollution
KW  - Environment-Health
ER  -