Biblio

T. Hammer, “Community self-help activities : proposals for action”, vol. A 286. Chr. Michelsen Institute, Fantoft, Norway, p. 41 p., 1983.

I. B. Sharaf Eldin, “Factors influencing domestic water use in developing countries, with reference to Elobeid, Sudan”, Journal of the Institution of Water Engineers and Scientists, pp. p. 539-546, 1979.