James D. Cochrane. The politics of regional interaction : the Central American case. New Orleans : Tulane University, 1969. xx, 225 p. David R. Ramsett. Regional industrial development in Central America (a case study of the integration industries scheme). New York : Frederick A. Praeger Publishers, 1969. xvi, 130 p. - Wionczek, Miguel S. (El Colegio de México A.C., 1970)