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nih.gov
ncbi.nlm.nih.gov
Kamen, Martin D. (1963). "Early History of Carbon-14: Discovery of this supremely important tracer was expected in the physical sense but not in the chemical sense". Science. 140 (3567): 584–590. doi:10.1126/science.140.3567.584. PMID17737092.
web.archive.org
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whoi.edu
nosams.whoi.edu
"What is carbon dating?". National Ocean Sciences Accelerator Mass Spectrometry Facility. Diarsipkan dari versi asli tanggal 2007-07-05. Diakses tanggal 2007-06-11.