“Afridev handpumps in Pakistan : private demand emerges for an affordable and reliable pump”
, vol. no. 2. UNDP-World Bank Water and Sanitation Program, Washington, DC, USA, p. 9 p. : photogr., 4 tab., 2000.
, vol. no. 7. St. Gallen, Switzerland: SKAT (Swiss Centre for Development Cooperation in Technology and Management), 2000, p. 78 p., 49 fig., 2 tab.