P. G. Alcock, Rivett-Carnac, J. L., et Fourie, K. J.,
« Current status of water supply and sanitation in rural and peri-urban areas of KwaZulu », in
Seminar on water supply and sanitation, KwaZulu : Elangeni Hotel, Durban, 28-30 June, 1988 : papers, 1988, p. Paper 2.2 (32 p.): tab.
H. Paqui,
« Low-cost sanitation in Mozambique »,
Waterlines, an international journal of water, sanitation and waste, p. p. 6-7: photogr., 1988.
S. Cairncross,
Small scale sanitation, 3rd ed.ᵉ éd., vol. no. 8. London, UK: Ross Institute of Tropical Hygiene, 1988, p. x, 60 p. : fig., tab., pl.