Patrocinado por el Instituto Nacional de Ciencias de la educacion y la Universidad Complutense, 1979. Paperback. 173p., paperbound in glossy 9x6.5 inch wraps; ex library with a rubber-stamped institutional name along top edge, and an accession numeral at the index, no other evidence; item is from the collection of a respected author and professor in this field. Upper cover has a small bump affecting every leaf; general edgewear with a crease to cover corner-tip; no ownership or other markings, a good copy. Text in Spanish.
Miguel Leon-Portilla was a very active participant; some twentyfive other scholars attended.