«Hand drilled wells»
, vol. no. 3. Calorama Rural Development Service, Elburg, The Netherlands, p. 65 p. : fig., photogr., tab., tech. drwngs., 1997.
«Private participation in the provision of water services : alternative means for private participation in the provision of water services»
, vol. no. 2. United Nations Economic Commission for Latin America and the Caribbean (ECLAC), Santiago, Chile, p. 73 p. : 9 boxes, 6 tab., 1997.
«Vector and pest control in refugee situations»
. United Nations High Commissioner for Refugees, Geneva, Switzerland, p. vi, 104 p., xvi p. pl. : 10 fig., 6 tab., 1997.
«Water supplies managed by rural communities : country reports and case studies from Cameroon, Colombia, Guatemala, Kenya, Nepal and Pakistan»
, vol. no. 5-E. IRC, The Hague, The Netherlands, p. x, 134 p. : fig., tab., 1997.
«Workshop on sustainable municipal waste water treatment systems, 12-14 November 1996, Leusden, the Netherlands»
, vol. no. 7. ETC, Leusden, The Netherlands, p. 225 p. + appendices (4 p.) : fig., drwngs., tab., 1997.