TY  - BOOK
AU  - Venugopala Rao, P.
TI  - Principles of environmental science and engineering
SN  - 8120328938
U1  - 333.7015 
PY  - 2006///
CY  - New Delhi
PB  - Prentice-Hall of India
KW  - environmental science
KW  - environmental  engineering
ER  -