M. Mulenga, Gift, M., en Fawcett, B.,
“An analysis of sanitation policies in southern Africa : the case of gender policies in sanitation in South Africa, Zambia and Zimbabwe”. Water, Engineering and Development Centre, Loughborough University of Technology, WEDC, Loughborough, UK, p. 12 p. : 1 fig.
“Applied study / EHP”. Environmental Health Project (EHP), Arlington, VA, USA.
“Appropriate technology”. IT Publications, London, UK.
I. N. National I. Hyderabad,
“Appropriate technology documentation bulletin”. National Institute of Small Industry Extension Training, Hyderabad, India.