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2. New waste-water treatment for industrial application;Bowker;Environ. Prog.,1983
3. Anaerobic fixed film waste-water treatment;Switzenbaum;Enzyme Microb. Technol.,1983
4. Technik der anaeroben Abwasserreinigung;Heijnen;Chem. Ing. Tech.,1984
5. Anaerobic Waste-water Treatment; Analysis of factors which enable the development of high-rate waste-water purification reactors;Heijnen,1983