John Ralph Willis

• In the path of Allah
• Slaves and slavery in Muslim Africa
• Slaves and slavery in Muslim Africa
• Studies in West African Islamic History
• Fragments of American life
• Slaves and Slavery in Africa
• Slaves and Slavery in Africa : Volume One
• Slaves and Slavery in Africa : Volume Two
• Slaves and Slavery in Africa Vol. 1
• Studies in West African Islamic history
• Studies in West African Islamic History
• Studies in West African Islamic History : The Cultivators of Islam, Volume 2 : the Evolution of Islamic Institutions and Volume 3