Geest, F. van der

Roark, P., Webster, M. & van der Geest, F., 1989. Emergency technical assistance to Botswana for rural water supply, (Wash field report no. 269) Arlington, VA, USA: Water and Sanitation for Health Project (WASH). Available at: https://fr.ircwash.org/sites/default/files/824-BW89-5906.pdf.