C. A. van Wijk-Sijbesma, Smet, J. E. M., Bastemeijer, T. F., Gondwe, H. A., Magonya, S. N., y Majumdar, J.,
«The DANIDA financed rural water supply programme in Iringa, Mbeya and Ruvuma Regions of Tanzania : report prepared by a joint evaluation mission from May 23th to June 20th 1987». DANIDA, Ministry of Foreign Affairs, Copenhagen, Denmark, p. 93 p.: tab., 1987.