Biblio

D. Lavanchy, “Distribution networks : technologies and their application to design and operation”, Aqua : journal of water supply research and technology, pp. p. 99-105 : 9 fig., 1997.

H. M. Raghunath, Ground water : hydrogeology, ground water survey and pumping tests, rural water supply and irrigation systems, 2nd ed.nd ed. New Delhi, India: Wiley Eastern, 1987, p. V, 563 P.: fig., tab.

I. Saevfors, “Maxaquene : a comprehensive account of the first urban upgrading experience in the new Mozambique”, vol. no. 37. UNESCO, Paris, France, p. 91 p.: fig., 1986.

Economic Development Institute -Washington, DC, US, “Ground water location : instructor guide”, vol. no. 19. World Bank, Washington, DC, USA, p. 98 p.: fig., 1985.