Report on two periods of fieldwork in this little-known area of Mesoamerica. Descriptions are given of more than 90 sites and the materials discovered during the exploration and excavations in the area. Defines and analyzes the sequence and changes in the pattern of settlement from the middle pre-Classic to the post-Classic. In Spanish.

Published by Universidad Nacional Autónoma de México (Mexico, D.F.), 1990. 302 pp. ISBN: 968-36-1432-9.

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