2020-05-272020-05-271980-03-21Mwalimu urges contour farming (1980,March 21) Daily News.pp.1http://41.86.178.5:8080/xmlui/handle/123456789/11573Available in print form, East Africana Collection, Dr. Wilbert Chagula Library. News paper collection.President Nyerere yesterday directed that all peasants in the country should adopt contour farming and plant trees in order to achieve sustainable production.enPresident NyererePeasantsRwamchangaNgarawameOther