"Harmonizing Economic Competitiveness with Environmental Quality: A North American Challenge." Edited by William E. Knepper. Santa Fe, NM: The North American Institute, 8-10 November 1991.

"Harmonizing Economic Competitiveness with Environmental Quality: A North American Challenge." Edited by William E. Knepper. Santa Fe, NM: The North American Institute, 8-10 November 1991., 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/376555 Accessed September 26, 2026.