Goodrich, Laurence B. RALPH EARL. Recorder for an Era. 96 pp., with 41 figs. with facing commentaries, small 4to, cloth. (n.p.), State University of New York, 1967. F-2637.

Kornhauser, Elizabeth Mankin et al. RALPH EARL The Face of the Young Republic. 258 pp., profusely illustrated in color. Folio, cloth. New Haven, Yale University Press, 1991.
Published to accompany an exhibition at the National Portarit Gallery, Washington, the Wadsworth Atheneum, Hartford, and the Amon Carter Museum, Fort Worth.