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Nowell, A. S. (2000). The archaeology of mind: Standardization and symmetry in lithics and their implications for the study of the evolution of the human mind(Order No. 9976462). Available from ProQuest Dissertations & Theses Global. (304613323). Retrieved from http://search.proquest.com/docview/304613323نسخة محفوظة 2020-01-28 على موقع واي باك مشين.