Published online by Cambridge University Press: 17 January 2008
* This article is a revision of a paper presented at the XVII annual convention of the International Studies Association, held at Toronto, Canada, in February, 1976.
Appreciation is expressed to two leading experts on the topic for their assistance: Mr. T. R. Martin, U.S. Section, International Boundary and Water Commission, Department of State, and Mr. César Sepúlveda, Director del Instituto Mexicano Matías Romero de Estudios Diplomáticos, Secretaría de Relaciones Exteriores.