↑ Oren, Eliezer D.; Yekutieli, Yuval (1992). "Taur Ikhbeineh: Earliest Evidence for Egyptian Interconnections". In van den Brink, Edwin C. M. (ed.). The Nile Delta in Transition: 4th–3rd Millennium B.C. Tel Aviv: Israel Exploration Society. p.361.
↑ Baumhoff, M. A. (1977). "Review of The Food Crisis in Prehistory: Overpopulation and the Origins of Agriculture". Agricultural History: 770–772. JSTOR3741761.
↑ Pyrah, B. (1988). The History of the Yorkshire Museum and its Geological Collections. North Yorkshire County Council. pp.125–133.
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