Vienna Radium Institute Radiocarbon Dates IV
Heinz Felber, Edwin Pak · Radiocarbon · 1973
Measurements have continued with the same proportional counter system, the same procedure in sample pretreatment, methane preparation and measurement, and the same age calculation using a half-life of 5568 ± 30 yr as described previously (R., 1970, v. 12, p. 298–318).