Kruger, A. y Lunoe, B.,
«Kigoma water programme : inspection report». NORAD, Norwegian Agency for Development Cooperation, Oslo, Norway, p. v, 94, 66 p.: fig., tab., 1991.
UNESCO -Cairo, EG,
«Training in water resources exploration, development, and management». UNESCO Regional Office for Science and Technology for the Arab States, Cairo, Egypt, p. 38 p.: 1 tab., 1991.