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Philip J. Arnold III 2003 Early Formative Pottery from the Tuxtla Mountains and Implications for Gulf Olmec Origins. Latin American Antiquity 14:29–46.
Philip J. Arnold III, Christopher A. Pool , Ronald R. Kneebone , and Robert S. Santley 1993 Intensive Ceramic Production and Classic-Period Political Economy in the Sierra de los Tuxtlas, Veracruz, Mexico. Ancient Mesoamerica 4:175–191.
Jeffrey P. Blomster 2002 What and Where is Olmec Style? Regional Perspectives on Hollow Figurines in Early Formative Mesoamerica. Ancient Mesoamerica 13:171–195.
David Cheetham 2011 Interregional Interaction and Social Identity in Mesoamerica, 1200-1000 B.C.: A Possible Olmec Enclave on the Pacific Coast of Chiapas, Mexico. Unpublished Ph.D. dissertation in preparation, School of Human Evolution and Social Change, Arizona State University, Tempe.
John E. Clark 1997 The Arts of Government in Early Mesoamerica. Annual Review of Anthropology 26:211–234.
Robert H. Cobean , Michael D. Coe , Edward A. Perry Jr., Karl K. Turekian and Dinkar P. Kharkar 1971 Obsidian Trade at San Lorenzo Tenochtitlan, Mexico. Science 174:666–671.
Robert H. Cobean , James R. Vogt , Michael D. Glascock , and Terrance L. Stocker 1991 High-Precision Trace-Element Characterization of Major Mesoamerican Obsidian Sources and Further Analyses of Artifacts from San Lorenzo Tenochtitlan, Mexico. Latin American Antiquity 2:69–91.
Kent V. Flannery and Joyce Marcus 2000 Formative Mexican Chiefdoms and the Myth of the “Mother Culture”. Journal of Anthropological Archaeology 19:1–37.
Laura Catalina O'Rourke 2002 Las Galeras and San Lorenzo: A Comparative Study of Two Early Formative Communities in Southern Veracruz, Mexico. Ph.D. dissertation, Department of Anthropology, Harvard University, Cambridge.
Christopher A. Pool 2007b Stone Monuments and Earthen Mounds: Polity and Placemaking at Tres Zapotes, Veracruz, Mexico. Paper presented at the Dumbarton Oaks Pre-Columbian Symposium, Antigua, Guatemala.
Minze Stuiver , and Paula J. Reimer 2004 Calib rev4.4.2 Radiocarbon Calibration Program. Quaternary Isotope Lab, University of Washinbton, Seattle.