W.E.B. du Bois materials: Published writings by numerous authors, Box: 4, Folder: 55. William Tuttle's research and teaching in African American history and the history of racial violence in 20th century America, RH MS 1472. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/388347 Accessed June 02, 2024.