Betancourt, J. L.; Long, A.; Donahue, D. J.; Jull, A. J. T.; Zabel, T. H. (1984-10-18). "Pre-Columbian age for North American Corispermum L. (Chenopodiaceae) confirmed by accelerator radiocarbon dating". Nature. 311 (5987): 653–655. Bibcode:1984Natur.311..653B. doi:10.1038/311653a0. S2CID4261979.
harvard.edu
ui.adsabs.harvard.edu
Betancourt, J. L.; Long, A.; Donahue, D. J.; Jull, A. J. T.; Zabel, T. H. (1984-10-18). "Pre-Columbian age for North American Corispermum L. (Chenopodiaceae) confirmed by accelerator radiocarbon dating". Nature. 311 (5987): 653–655. Bibcode:1984Natur.311..653B. doi:10.1038/311653a0. S2CID4261979.
semanticscholar.org
api.semanticscholar.org
Betancourt, J. L.; Long, A.; Donahue, D. J.; Jull, A. J. T.; Zabel, T. H. (1984-10-18). "Pre-Columbian age for North American Corispermum L. (Chenopodiaceae) confirmed by accelerator radiocarbon dating". Nature. 311 (5987): 653–655. Bibcode:1984Natur.311..653B. doi:10.1038/311653a0. S2CID4261979.