A. Malina, Hodgkin, J., Leblanc, M., y Robertson, D.,
«Drought relief assistance to the water supply task Force of the National Consultative Forum on the Drought (Republic of South Africa)», vol. no. 388. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. xii, 56 p.: 8 photogr., 1993.