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Reply to Simon and Reed: Independent and converging results rule out historic disturbance and confirm age constraints for Barrier Canyon rock art.
Pederson JL, Chapot MS, Simms SR, Sohbati R, Rittenour TM, Murray AS, Cox G. Pederson JL, et al. Among authors: sohbati r. Proc Natl Acad Sci U S A. 2014 Dec 30;111(52):E5604. doi: 10.1073/pnas.1421319112. Epub 2014 Dec 23. Proc Natl Acad Sci U S A. 2014. PMID: 25538305 Free PMC article. No abstract available.