TY  - BOOK
ED  - Water Environment Federation (WEF)
TI  - Automation of wastewater treatment facilities: WEF manual of practice no. 21 
SN  - 0071479376
PY  - 2007///
CY  - Alexandria, Virginia
PB  - Water Environment Federation
KW  - Sewage
KW  - Purification
KW  - Automation
KW  - Instruments
N1  - Includes index; 'Prepared by Automation of Wastewater Treatment Facilities Task Force of Water Environment Federation' - verso
ER  -