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The papaloapan project : agricultural development in the Mexican tropics
Poleman, Thomas T., (1964)
Economics of smallholder farming in Rhodesia. A cross-section analysis of two areas
Massell, Benton F., (1968)
The Food Research Institute's Fiftieth Anniversary Conference, strategies for agricultural development in the 1970s : a summery and critique
Hunter, Guy, (1973)