TY  - BOOK
AU  - Gray,N.F.
TI  - Water Technology 
SN  - 9788176491532
U1  - 365 GRA 
PY  - 2000///
CY  - New Delhi : 
PB  - Viva Books Private Limited, 
KW  - Water quality management
KW  -  Sewage disposa
KW  -  Freshwater
N1  - Includes index
ER  -