Smet, J.E.M., Terry, B., y Klaassen, W., «Report of third backstopping mission to the Netherlands-supported water supply programmes in Namibia», IRC, The Hague, The Netherlands, 1996.

Smet, J.E.M., Terry, B., y Klaassen, W., «Report of second backstopping mission to the Netherlands-supported water supply programmes in Namibia», vol. no. 2. IRC, The Hague, The Netherlands, p. iv, 31 p. + 10 annexes (ca. 50 p.) : tab., 1995.

Moynihan, M., Krhoda, G.O., Klaassen, W., Matagaro, W.O., Mutinda, J.M., y Oyieke, T.O., «After the matchbox fell in the waterpot : final report of the review mission to the Rural Domestic Water Supply and Sanitation Programme phase II (RDWSSP/II) Nyanza Province, Kenya, May 24 - June 17 1994». SAWA, Ede, The Netherlands, p. xxx, 58 p. + annexes (ca. 40 p.) : fig., maps, tab., 1994.