TY  - BOOK
AU  - Gray,N.F.
TI  - Water technology: an introduction for scientists and engineers 
SN  - 0340676450
AV  - TD365 .G73 1984
U1  - 628.1 
PY  - 1984///
CY  - London
PB  - Arnold
KW  - Water quality management
KW  - Sewage disposal
KW  - Freshwater biology
ER  -