www.awwa.org
www.dvgw.de/wasser
www.epa.gov
www.iapws.org
www.wef.org
American Water Works Association
Gesellschaft des Gas- und Wasserfachs, e.V.
US Environmental Protection Agency
International Association for the Properties of Water and Steam
Water Environmental Federation (USA)
http://www.vgb.org/
http://www.ppchem.com/
http://www.epri.com/
VGB PowerTech, e.V. (Germany)
PPCHEM AG, Switzerland
Electric Power Research Institute (USA)
www.astm.org
www.iso.org
www.standardmethods.org
American Society for Testing and Materials
International Organization for Standardization
Standard Methods for the Examination of Water and Wastewater (USA)
www.profibus.com