TY  - BOOK
ED  - Water and Land Supervisor's Conference
ED  - United States.
TI  - Water management at its best
U1  -  628.1680973 
PY  - 1972///
CY  - Washington, D.C.
PB  - U.S. Government Printing Office
KW  - Water quality managementes
KW  - United States
KW  - Sewage
KW  - Purification
ER  -