0 Cobean, Robert H. Glascock, Michael D. Stocker, Terrance L. Vogt, James R. 1991 High-precision trace-element characterization of major Mesoamerican obsidian sources and further analyses of artifacts from San Lorenzo Tenochtitlan, Mexico Latin American Antiquity Washington, D. C 2 69-91 Indians of Mexico--Antiquities, Nuclear activation analysis--Mexico, Obsidian--Mexico--Analysis, Archaeology--Mexico, Mexico--Antiquities, Stone implements--Mexico--Analysis, San Lorenzo Tenochtitl, án Site (Mexico) Source of data: Anthropological Literature, Harvard UniversitySpanish summary1045-6635