- L'Hermite, P. (Pierre), 1936- (3)
- Commission of the European Communities (2)
- Angeletti, G. (Giovanni), 1943- (1)
- Austria. Bundesministerium für Gesundheit und Umweltschutz (1)
- Bruce, A. M. (1)
- Carberry, Judith B. (1)
- Catroux, G., 1938- (1)
- Commission of the European Communities. Directorate-General for Science, Research, and Development (1)
- Commission of the European Communities. Environment Research Programme (1)
- Conference "Sewage Sludge Treatment and Use" (1)
- Dirkzwager, A. H. (1)
- Englande, A. J. (1)
- European Cooperation in the Field of Scientific and Technical Research (Organization) (1)
- European Water Pollution Control Association (1)
- Hucker, T. W. G., 1922- (1)
- Institution of Mechanical Engineers (Great Britain). Power Industries Division (1)
- Instituut voor Bodemvruchtbaarheid (Netherlands) (1)
- NATO Advanced Study Institute on Sludge Characteristics and Behavior (1)
- Nederlandse Vereniging voor Afvalwaterbehandeling en Waterkwaliteitsbeheer (1)
- Newman, P. J. (1)
- Ott, H. (1)
- Quaghebeur, D. (1)
- Temmerman, I. (Imgrid) (1)