Narrow search
Showing 1 - 4 of 4
Cover Image
Has extension failed? : a case study of maize-growing practices in Iringa, Tanzania
Vries, J. de - 1976
Persistent link: https://www.econbiz.de/10002987994
Cover Image
On the effectiveness of agricultural extension : a case study of maize growing practices in Iringa, Tanzania
Vries, J. de - In: Eastern Africa journal of rural development 9 (1976) 1/2, pp. 37-56
Persistent link: https://www.econbiz.de/10002988008
Cover Image
Ujamaa villages and problems of institutional change, with emphasis on agricultural extension and development
Vries, J. de - 1977
Persistent link: https://www.econbiz.de/10002988021
Cover Image
Farmer "resistance" to extension advice : who is to blame? ; a case study of cotton production in Mara Region, Tanzania
Keregero, K. J. B. (contributor); Vries, J. de (contributor) - 1977
Persistent link: https://www.econbiz.de/10003132228