TY  - BOOK
AU  - Lal, D., and Upadhyay, A. K.
TI  - Water Supply and Waste Water Engineering 
SN  - 9789350143766
PY  - 2001///
CY  - New Delhi
PB  - S.K. Kataria & Sons
KW  -  
KW  - Environmental Science
ER  -