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(a) S. Mellaart, Çatal Hüyük. London, 1967. P. 217–218; (b) Mellaart: AS XIV, 1964. P. 111, 114; (c) T.A. Wertime: “Man’s First Encounters with Metallurgy”, Science 146, no. 3649. 1964. P. 1257–1267, etc.