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New extension methods to speed up diffusion of agricultural innovations
Schönherr, Siegfried, (1974)
Rural sociology and rural development : its application in Kenya
Mbithi, Phillip M., (1974)
African traditional subsistence economy in change : a field study for a planned development of the traditional subsistence agricultural and household economy of the Ababassi people in Kenya
Wilemski, Edmund Alojzy, (1975)