TY  - GEN
AU  - Raymond D, Letterman
AU  - Letterman,Raymond D,
AU  - 
TI  - WATER QUALITY AND TREATMENT
SN  - 0070016593
U1  - 628.1 
PY  - 1999///
CY  - 
PB  - Mcgraw-Hill, New York
KW  - Water Purification
KW  - Water Quality
ER  -