TY  - GEN
AU  - UPADHYAY, A. K.
AU  - LAL, D.
TI  - WATER SUPPLY & WASTE WATER ENGINEERING 
SN  - 9789350143766
U1  - 628.1 
PY  - 2023///
CY  - NEW DELHI
PB  - S.K. KATARIA & SONS
ER  -