Annual report ...
Department of Lands and Mines, afterwards Department of Lands and Surveys, afterwards Ministry of Lands and Surveys, afterwards Ministry of Lands, Surveys and Water (Tanganyika Territory). - Water Development and Irrigation Division.
Dar es Salaam, 
1961.
Previous to 1958 the Department of Water Development and Irrigation was a separate department, and in 1959 it became part of the Ministry of Natural Resources.