Biblio

G. B. Oxfam - Oxford, “Oxfam guidelines for water treatment in emergencies”. Oxfam, Oxford, UK, p. 45 p. : 4 fig., 2001.

M. D'Aquino and Teves, S. A., “Lemon juice as a natural biocide for disinfecting drinking water”, Bulletin of the Pan American Health Organization, pp. p. 324-330: 6 tab., 1994.

Wollschied, “Handpump corrosion in deep bore-holes”, Low-cost pumping systems, pp. p. 1-3: tab., 1990.