TY  - GEN
AU  - Rao, P. Venugopala
TI  - Principles of environmental science and engineering 
SN  - 9788120328938
PY  - 2006///
CY  - New Delhi
PB  - PHI Learning Private Limited
KW  - Environmental science
KW  - Environmental engineering
KW  - Environmental protection
KW  - Human ecology
ER  -