The Philosophical Society of the Sudan

Sudan, T.Philosophi & Research, S.D.The Nation, 1976. Water quality and risks of water pollution in the Sudan : 19th annual conference 17-21 April 1976 : programme and abstracts, Khartoum, Sudan: University of Khartoum, Faculty of Engineering. Available at: http://fr.ircwash.org/sites/default/files/71PSS76-384.1.pdf.