Adams, Richard E. W. 1991 Prehistoric Mesoamerica.Revised edition. University of Oklahoma Press, Norman. Anawalt, Patricia Rieff 1997 Traders of the Ecuadorian Littoral. Archaeology50(6):48-52. 1998 They Came to Trade Exquisite Things: Ancient West Mexican-Ecuadorian Contacts. In Ancient West Mexico: Art and Archaeology of the Unknown Past,edited by Richard F. Townsend, pp. 233-249. The Art Institute of Chicago, Chicago. Braun,