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"A Clean Mexico: The Protection of the Environment: A Survey of Technologies Used and Investment Made by U.S. Companies Operating in Mexico." Mexico: The American Chamber of Commerce of Mexico, March 1992., Box: LAC. Rodman C. Rockefeller Records of the Mexico-U.S. Business Committee, 2005-09. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/376556 Accessed September 26, 2026.