Anthology of articles first presented in a 1973 symposium on the subject of the title. Contributions from John Paddock, Jeffrey R. Parsons, Evelyn C. Rattray, Richard A. Diehl, J. Charles Kelley, Ellen Abbot Kelley, Jaime Litvak King, Richard E. Blanton, Donald L. Brockington, and Joseph B. Mountjoy. In Spanish.

Published by Universidad Nacional Autónoma de México (Mexico, D.F.), 1987. 288 pp. ISBN: 968-36-0427-7.

$15.00 (shipping included). Order code UN017.