1. Slavery indispensable to the civilization of Africa. McKenney, Samuel [Browse] Baltimore, Printed by J. D. Toy, 1855. Book, Microform Loading...Firestone Library - Microforms Services (Film) » MICROFICHE 199 Bookmark
2. Slavery indispensable to the civilization of Africa McKenney, Samuel [Browse] Baltimore : Printed by J. D. Toy, 1855. Book Online Slavery and Anti-Slavery: A Transnational Archive, Part I: Debates over Slavery and Abolition Bookmark