Reimer, P. J., Baillie, M. G. L., Bard, E., Bayliss, A., Beck, J. W., Blackwell, P. G., et al. (2009). Intcal09 and marine09 radiocarbon age calibration curves, 0–50,000 years cal bp. Radiocarbon, 51(4), 1111-1150. Retrieved from https://www.uair.arizona.edu/restrictedobjectviewer?o=http://radiocarbon.library.arizona.edu/Volume51/Number4/49691745-6a68-4e2c-a26f-08f0a16c1a53.