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Marks, Anthony E. and Mohammed-Ali, Abbas and Peters, Joris and Robertson, Robin (1985): The Prehistory of the Central Sudanese Nile Valley as senn from its Eastern Hinterlands. Excavations at Shaqadud, Sudan. In: Journal of Field Archaeology, Vol. 12: pp. 261-278
Marks, Anthony E. and Peters, Joris and Neer, Wim van (1987): Late Pleistocene and Early Holocene Occupations in the Upper Atbara River Valley, Sudan. In: Close, Angela E. (ed.) , Prehistory of arid North Africa. Dallas: Southern Methodist University Press. pp. 137-161