TY  - BOOK
AU  - Rao,P Venugopala
TI  - Principles of environmental science and engineering
SN  - 9788120328938
U1  - 628 RAO 
PY  - 2016///
CY  - New Delhi
PB  - PHI Learning Private Limited
KW  - Environmental engineering
KW  - Environmental science
ER  -