TY  - BOOK
AU  - Punmia, B. C...[et al.].
AU  - Jain, Ashok.
AU  - Jain, Arun.
TI  - Environmental engineering
SN  - 8170080924
U1  - 628.1 22
PY  - 2007///
CY  - New Delhi
PB  - Laxmi Publications
ER  -