The origin of obsidian in the valley of Maltrata, Veracruz México.Published in:Journal of Radioanalytical & Nuclear Chemistry, 2013, v. 295, n. 2, p. 915, doi. 10.1007/s10967-012-2307-8By:Molina-Vázquez, R.;Jimenéz-Reyes, M.;Lira-López, Y.;Tenorio, D.Publication type:Article