HIID development discussion paper. Cambridge, MA, USA: Harvard Institute for International Development.
C. A. van Wijk-Sijbesma,
“HIV/AIDS and water supply, sanitation, hygiene”. Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, Loughborough, UK, p. 4 pag. : 1 fig.
J. Fisher,
The HIV/AIDS millennium development goal : what water and sanitation and hygiene can do, vol. no. 5. Loughborough, UK: Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, p. 4 p. : photogr.
P. E. C. E. P. I. S. - Lima,
“Hojas de divulgacion technica”. CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), Lima, Peru.
“HPG research report”. Overseas Development Institute (ODI), London, UK.