Due, John F.
Taxation and economic development in tropical Africa
MIT Press, 1963
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Coughlan, Robert
Tropical Africa
Time Incorporated, 1962
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The demography of tropical Africa
by William Brass ... [et al.]
Princenton University Press, 1968
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The population of tropical Africa
edited by John C. Caldwell and Chukuka Okonjo
Longmans, Green, 1968
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Tropical resources : ecology and development
edited by Jose I. Furtado
Harwood Academic , 1990.
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