See the bibliographic essay in Hurlburt's The Mexican Muralists in the United States (pp. 293-5, cited below) for recent comments on the state of the literature on Orozco and on the Mexican muralists.
Baas, Jacquelynn. "Interpreting Orozco's Epic." Dartmouth Alumni Magazine. vol. 63 no. 5 (Jan/Feb, 1984): pp. 44-49.
Helm, MacKinley. Man of Fire: J. C. Orozco; an Interpretative Memoir. [1st ed.] New York, Harcourt, Brace [1953].
JosÉ Clemente Orozco. Introduction by Alma Reed. New York : Delphic Studios, 1932.
Orozco! : 1883-1949. (exhibition catalogue) Oxford : Museum of Modern Art, 1980.
Reed, Alma. Orozco. New York: Oxford University Press, 1956.
Charlot, Jean. The Mexican Mural Renaissance, 1920-1925. New Haven: Yale University Press, 1963.
Goldman, Shifra M. Contemporary Mexican Painting in a Time of Change. Austin : University of Texas Press, 1981.
Hurlburt, Laurance P. The Mexican Muralists in the United
States. Albuquerque : University of New Mexico Press, 1989.
See pages 56-88 on the Dartmouth College murals.
Pellicer, Carlos. Mural Painting of the Mexican Revolution. 2nd. ed. Mexico : Fondo Editorial de la Plastica Mexicana, 1985.
Rochfort, Desmond. Mexican Muralists: Orozco, Rivera, Sequeiros. New York: Universe, 1994.