University of London. Centre of African Studies, University of London. Centre of Middle Eastern Studies, Allan, J. A., & Barker, G. (1981). The Sahara, ecological change and early economic history. Middle East & North African Studies Press.
Citace podle Chicago (17th ed.)University of London. Centre of African Studies, University of London. Centre of Middle Eastern Studies, J. A. Allan, a Graeme Barker. The Sahara, Ecological Change and Early Economic History. Outwell, Cambridgeshire: Middle East & North African Studies Press, 1981.
Citace podle MLA (8th ed.)University of London. Centre of African Studies, et al. The Sahara, Ecological Change and Early Economic History. Middle East & North African Studies Press, 1981.
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