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2000
K. Wehrle, Pfiffner, H., Meuli, C., and Muller, H., Building construction, vol. no. 3. St. Gallen, Switzerland: SKAT (Swiss Centre for Development Cooperation in Technology and Management), 2000, p. 57 p. : fig., photogr., techn.drwg.
1999
K. Wehrle, Report on short term consultancy to NGO Forum for Drinking Water Supply and Sanitation on domestic rainwater harvesting in Bangladesh. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. ca. 15p., 1999.
1996
P. Schubeler, Wehrle, K., and Christen, J., Conceptual framework for municipal solid waste management in low-income countries, vol. no. 9. UNDP/UNCHS/World Bank-Urban Management Programme, c/o World Bank, Washington, DC, USA, p. 55 p. : 2 fig., 1996.
1994
K. Wehrle, Brief note on NETWAS, the International Training Network (ITN) Centre for East Africa, presented at the 1994-01-01, St. Gallen, Switzerland, 1994, p. 17 p.: 6 fig., 1 tab.
K. Wehrle, Bashemererwa, V., and Makokha, A., Evaluation of NETWAS : (Network for Water and Sanitation) ITN's Regional Centre for East Africa : February/March 1994. [Volume I]. Main report. Swiss Agency for Development and Cooperation (SDC), Bern, Switzerland, p. 78 p. : fig., photogr., tab., 1994.
K. Wehrle, Bashemererwa, V., and Makokha, A., Evaluation of NETWAS : (Network for Water and Sanitation) ITN's Regional Centre for East Africa: February / March 1994. Abridged version. Swiss Agency for Development and Cooperation (SDC), Bern, Switzerland, p. 45 p. + ca. 65 p. annexes : boxes, fig., 1994.
1993
K. Wehrle, Hall, D., and Christen, J., Monitoring and evaluation of water and sanitation projects : concepts and tools, workshop experiences : report on the AGUASAN Regional Workshop, Mohale's Hoek, Lesotho, June 1993. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. 116 p. : fig., photogr., tab., 1993.
1991
K. Wehrle, Drinking water supply programme in kabubaten Manggarai, West Flores, Indonesia, implementation by Yayasan St. Klaus : mission report for intercooperation. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. 138 p.: fig., tab., 1991.
1985
K. Wehrle, Alto Beni (D.A.B.), Bolivia : sector: drinking water supply and sanitation : technical aspects, vol. no. 5. SKAT (Swiss Centre for Development Cooperation in Technology and Management), St. Gallen, Switzerland, p. 2 vol. (iv, 92, 80 p.): fig., tab., 1985.