R. Tesselaar, Zintl, M., and Terbergen, E.,
Impact evaluation of drinking water supply and sanitation programmes in rural Benin : the risk of vanishing effects, vol. 357. The Hague, The Netherlands: Netherlands, Ministry of Foreign Affairs, Policy and Operations Review Department (IOB), 2011, p. 195 p.; 16 fig.; 31 tab.; 3 boxes.