Harrar, J.G. Mexican Agricultural Program: A Review of the First Six Years of Activity Under the Joint Auspices of the Mexican Government and the Rockefeller Foundation. New York: Rockefeller Foundation, 1950

Harrar, J.G. Mexican Agricultural Program: A Review of the First Six Years of Activity Under the Joint Auspices of the Mexican Government and the Rockefeller Foundation. New York: Rockefeller Foundation, 1950, Box: 83. George I. Sánchez Papers, 23866736. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/541572 Accessed September 27, 2026.