1. WATER was programmed by Mase and Bessler (1991) at the Department of Geology of the University of British Columbia on the basis of the ASME steam tables in Meyer et. al (1979).
2. courtesy of Roland Wagner, Applied Geophysics, Aachen University (RWTH)
3. courtesy of Heinke Stöfen, Water Management and Water Supply, Technical University Hamburg-Harburg (TUHH)