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(2005) Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th\/234U\/238U and 14C dates on pristine corals. 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(1998) Radiocarbon calibration by means of mass spectrometric Th-230\/U-234 and C-14 ages of corals: An updated database including samples from Barbados, Mururoa and Tahiti. Radiocarbon, 40(3), pp.1085-1092. doi:10.1017\/s0033822200019135"},{"ref":"bard1990cty","firstauthor":"Bard","year":1990,"reftype":"article","author":"Bard, Edouard and Hamelin, Bruno and Fairbanks, Richard G. and Zindler, Alan","title":"Calibration of the 14C timescale over the past 30,000 years using mass spectrometric U\u2013Th ages from Barbados corals","journal":"Nature","volume":"345","number":"6274","pagefrom":0,"pageto":0,"series":"","publisher":"Springer Science and Business Media LLC","address":"","booktitle":"","chapter":null,"edition":null,"organization":"","school":"","institution":"","url":"https:\/\/dx.doi.org\/10.1038\/345405a0","doi":"10.1038\/345405a0","isbn":"","citation":"Bard et al., 1990","reference":"Bard, E., Hamelin, B., Fairbanks, R.G. and Zindler, A. 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