{\rtf1\ansi\deff0\deftab360 {\fonttbl {\f0\fswiss\fcharset0 Arial} {\f1\froman\fcharset0 Times New Roman} {\f2\fswiss\fcharset0 Verdana} {\f3\froman\fcharset2 Symbol} } {\colortbl; \red0\green0\blue0; } {\info {\author Biblio}{\operator }{\title Biblio RTF Export}} \f1\fs24 \paperw11907\paperh16839 \pgncont\pgndec\pgnstarts1\pgnrestart Clark, J. E., & Lee T. A. (1984).\'a0\'a0Formative obsidian exchange and the emergence of public economies in Chiapas, Mexico. (Hirth, Kenneth G., Ed.).\ul Trade and exchange in early Mesoamerica. . \ul0 235-274.\par \par }