Howard Pehrson - The Stars and Swipes Forever (1968), Double the Trouble (1968), The Brave and the Damned (1964), Butch Cassidy and The Wild Bunch (1969), Box: 16, Folder: 36. Corporate Papers of the Robert Mills Literary Agency, MS 307. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/229807 Accessed November 23, 2024.