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Baumwolle, Sklaven und Kredite : die Basler Welthandelsfirma Christoph Burckhardt & Cie. in revolutionärer Zeit (1789 - 1815)
Stettler, Niklaus, (2004)
The impact of the slave trade on literacy in West Africa : evidence from the colonial era
Obikili, Nonso, (2016)
The Transatlantic slave trade from West Africa
(1965)