Biblio

R. Carter, Howsam, P., y Tyrrel, S., «Assumptions and realities in water and sanitation programmes», Waterlines, an international journal of water, sanitation and waste, pp. p. 2-5 : 1 box, 1 photogr., 2 tab., 1999.

R. Carter, Howsam, P., Gardner, S., y Tyrrel, S., «Biological removal of iron from well-handpump water supplies», Waterlines, an international journal of water, sanitation and waste, pp. p. 29-31 : 2 fig., 3 photogr., 1998.