B. Gumbo, Jonker, L., Robinson, P., and van der Zaag, P.,
“Post-graduate training module on water demand management”. World Conservation Union (IUCN), Pretoria, South Africa, p. 90 p. : fig., photogr., tab. , 2003.
B. Neupane,
“Valuing water : UN world water development report”. UNESCO World Water Assessment Programme Secretariat, Paris, France, p. 19 p. : 2 boxes, 2 fig., 5 tab., 2003.