Congres of Assoication Internationale de.Congres of Association Internationale des Ponts et Charpents(10e : 1976 : Tokyo): Rapport preliminaire /.Secretariat de L`aipe a Zurich,,1976.
InternationalAssociationonWaterPollutionResearch,Advanced treatment and reclamation of wastewater.Advanced treatment and reclamation of wastewater (1977 : Johannesburg).Pergamon,1978.