Carbon-14 dating of small samples by proportional counting.
Conventional carbon-14 dating by means of gas proportional counters has been extended to samples containing as little as 10 milligrams of carbon. The accuracy of the dating procedure has been checked by dating sequoia tree-ring samples of the 1st century A.D. and B.C. and an oak tree-ring sample of the 19th century A.D.
Harbottle
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G
Sayre
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EV
Stoenner
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RW