Changes in the upland irrigation system and implications for rural poverty alleviation : a case of the Ndiwa irrigation system, West Usambara Mountains, Tanzania /
Cosmas H. Sokoni, Tamilwai C. Shechambo.
- Dar es Salaam : Mkuki na Nyota Publishers, c2005.
- ix, 44 p. : some col. ill. ; 27 cm.