G. Rheinheimer
Risk Reduction Engineering Laboratory (U.S.)
Robert C. Neal
George B. Morgan
Sara Hallin
Burkhard Teichgräber
California. Dept. of Water Resources.
Siedlungswasserwirtschaftliches Kolloquium (57th 1982 Stuttgart, Germany)
New Zealand. Dept. of Scientific and Industrial Research.
S. Geno Lehman
United States. Environmental Protection Agency. Office of Wastewater Management
Werner Maier
Joanna Surmacz-Górska
Conference on Nitrogen as a Water Pollutant (1975 Copenhagen)
Unknown Author
Ontario. Ministry of Environment and Energy.
Klangduen Pochana
H. David Stensel
Hans-Bertil Wittgren