Works on Littlefield include David B. Gracy, II, George Washington Littlefield: A Biography in Business (Ph.D. dissertation; Texas Tech University, 1971) and J. Evetts Haley's George W. Littlefield, Texan (1943; through the University of Oklahoma Press in Norman, Oklahoma).
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Brennan, T. Corey: "Triumphus in Monte Albano", 315-337 in R. W. Wallace & E. M. Harris (eds.) Transitions to Empire. Essays in Greco-Roman History, 360-146 B.C., in honor of E. Badian (University of Oklahoma Press, 1996) ISBN 0-8061-2863-1