TY  - BOOK
AU  - Trudgill,Stephen .
AU  - Walling,Des E..
AU  - Webb,Bruce  .
TI  - Water quality : processes and policy / 
SN  - 0471985473
U1  - 363.739456 
PY  - 1999///
CY  - New York : 
PB  - John Wiley , 
KW  - WATER QUALITY
N1  - Includes bibliography and index
ER  -