1. Responses of maize to application of compound fertilizer on farmers' fields in ten districts of Tanzania;Anderson;E. Afr. Agric. For. J.,1969
2. Studies of soil erosion control and land reclamation in Kondoa District. An evaluation of the HADO project;Banyikwa,1979
3. Conservation as a tool for development in tropical countries;Budowski;Geoforum,1972
4. Soil erosion and sedimentation in semi-arid Tanzania. Studies of environmental changes and ecological imbalances;Christiansson,1981
5. Soil map' of Africa, 1:5 000 000;D'Hoore,1964