TY  - GEN
AU  - Letterman R.D.
TI  - Water Quality and Treatment: A Handbook of community water supplies
SN  - 0070016593
U1  - 628.1221 
PY  - 1999///
CY  - New York
PB  - McGraw-hill Inc.
KW  - Drinking water, helt and aesthetic
ER  -