Proceedings relating to the placing of an additional monument to more perfectly mark the international boundary line through the towns of Caléxico, California, and Mexicali, Baja California, and the restoration of international monument no. 221, near those towns
International Boundary and Water Commission (United States and Mexico) [from old catalog]; Mills, Anson, b. 1834; Beltrán y Puga, Fernando. [from old catalog]; United States. Dept. of State