Whitford, John Trading life in western and central Africa / John Whitford. - 2nd ed., with a new introduction by A. G. Hopkins. - London: Cass, 1967 - xxii, v-ix, 335 p.: plate (map); 23 cm - Cass library of African studies. General studies; no. 40 . Subjects--Topical Terms: Slave trade. Subjects--Geographic Terms: Africa, West--Description and travel. Dewey Class. No.: 916.66 WHI