TY  - BOOK
AU  - Khanna, D. R, and others,
TI  - Water and Wastewater Management (Vol.1)
SN  - 9788170357483
SN  - 978-81-70
U1  - 333 
PY  - 2011///
CY  - Delhi
PB  - Daya Publishing House
KW  - Economics ofland & energy
ER  -