Lead (Pb) Isotope Baselines for Studies of Ancient Human Migration and Trade in the Maya Region Sharpe, Ashley E. ; Kamenov, George D. ; Gilli, Adrian ; Hodell, David A. ; Emery, Kitty F. ; Brenner, Mark ; Krigbaum, John Abstract Publication: PLoS ONE Pub Date: November 2016 DOI: 10.1371/journal.pone.0164871 Bibcode: 2016PLoSO..1164871S