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The following radiocarbon dates are a partial list of samples measured for a variety of projects and materials since May 1982. Chemical and counting procedures remain the same as indicated in R, v 20, p 274–282.Calculations are based on the 5568-year Libby14C half-life. Precision is reported as one-standard deviation based only on statistical counting uncertainties in the measurement of the background, NBS modern standard, and sample activities. δ13C values are measured relative to PDB anddoi:10.1017/s0033822200006317 fatcat:brafahdhrbat5bxuex5hprzysm