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River of wealth, river of sorrow : the Central Zaire Basin in the era of the slave and ivory trade, 1500 - 1891
Harms, Robert W., (1981)
Farming systems in Africa : the great lakes highlands of Zaire, Rwanda, and Burundi
Jones, William I., (1984)
Market orientation, rural out-migration, crop production and household food security : the case of smallholders in Central Africa
Ochieng, Justus, (2014)