Biblio

S. McKenzie and de la Haye, R., “Oxfam in Goma : a public-health learning experience”, Waterlines, an international journal of water, sanitation and waste, pp. p. 14, 19-20 : 1 fig., 1 tab., 4 photogr., 1996.

H. I. Shuval and Gruener, N., “Health effects of nitrates in water”. US Environmental Protection Agency (EPA), Cincinnati, OH, USA, p. xii, 149 p., 1977.