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The following is a list of dates obtained since the compilation of List XII. The method is essentially the same as described in that list. Two CO2-CS2Geiger counter systems were used. Equipment and counting techniques have been described elsewhere (Crane, 1961). Dates and estimates of error in this list follow the practice recommended by the International Radiocarbon Dating Conferences of 1962 and 1965, in that (a) dates are computed on the basis of the Libby half-life, 5570 yr, (b) a.d. 1950doi:10.1017/s0033822200036250 fatcat:yjf4llyeb5gjpc3sfkvyuqbpee