TY  - GEN
AU  - Trivedi, P.R
AU  - Raj, Gurdeep
TI  - Encyclopaedia of environmental sciences, Vol.4: Environmental air pollution
SN  - 8171582796
U1  - 551.03 
PY  - 1992///
CY  - 1992
PB  - Akashdeep
KW  - ENCYCLOPAEDIA
KW  - ENVIRONMENT, POLLUTION, ECOLOGY
ER  -