TY  - BOOK
AU  - Trudgill, Stephen T.,
AU  - Walling, Des E.,
AU  - Webb, Bruce W.,
TI  - Water quality processes and policy
SN  - 9780471985471(hbk)
U1  - 363.739456 
PY  - 1999///
CY  - New Delhi
PB  - John Wiley & Sons, Inc
ER  -