Maize sample recovered from Trench 1A, Level 6, in a Cuadros phase ceramic context (Clark 1994:547, Appendix 3).
Clark, J. E. 1994 The Development of Early Formative Rank Societies in the Soconusco, Chiapas, Mexico. Unpublished Ph.D. dissertation, Department of Department of Anthropology, University of Michigan, Ann Arbor.