Biblio

G. B. -.Foundation London, “Foundation for the transfer of knowledge : foundation seminar : 30 May 1991”. IWSA Foundation for the Transfer of Knowledge, London, UK, p. ca. 102 p.: fig., tab., 1991.

M. F. Djerrari, “Water and sanitation in urban areas of big African cities”, Water supply : the review journal of the International Water Supply Association, p. P. FS 18 - FS 22: 5 fig., 6 tab., 1991.