TY  - BOOK
AU  - Rao 
TI  - Textbook of environmental engineering 
SN  - 8120319303 
U1  - 628 RAO 2002 
PY  - 2002///
CY  - New Delhi
PB  - Prentice-Hall of india Private Limited
KW  - Environmental engineering
N1  - Includes index
ER  -