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Kola in the history of West Africa
Lovejoy, Paul E., (1980)
Politics of the kola trade : some processes of tribal community formation among migrants in West African towns
Cohen, Abner, (1966)
Pour l'unité ouest-africaine. Microetats et intégration économique
Diagne, Pathé, (1972)
Pawnship in Africa : dept bondage in historical perspective
Falola, Toyin, (1994)
Unfree labour in the development of the Atlantic world
Lovejoy, Paul E., (1994)
Slavery in West Africa
Klein, Martin, (1979)