No CrossRef data available.
Published online by Cambridge University Press: 18 July 2016
The following list includes samples dated in 1968 and 1969. Wood dating from A.D. 1850 ± 10 yr is used as contemporary reference standard. Background sample is synthesized from anthracite or shungite. All radiocarbon dates were calculated with C14 half-life of 5568 ± 30 yr. All dates are calculated from the year 1950.