Yeager, Rodger
Tanzania : an African experiment
Westview Press, 1989
Buku Teks
Yudelman, Montague
Africans on the land : economic problems of african agricultural development in Southeren,Central, and East Afric, Whit special reference to Southern Rhodesia
Harvard University Press , 1975
Buku Teks
Moisture availability and agricultural potentialities of Mali and Niger
Artikel Jurnal
Norton, George W.
Introduction to economics of agricultural development
McGraw-Hill, 1993
Buku Teks
Mellor, John W.
The economics of agricultural development
Cornell University Press, 1966
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