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136
Ts.N. Abesadze, R.A. Bakhtadze, T.A. Dvali, O.M. Japaridze, On the History of Copper and Bronze Metallurgy in Georgia, Tbilisi, 1958, etc.
137
(a) S. Piggott, Ancient Europe, Edinburgh, 1965. P. 74; (b) F. Hančar, “Die Nadelformen des Prähistorischen Kaukasusgebietes”, ESA 7. 1932. P. 113–182.