Ross - Awake to Terror (1975), Barnabas Collins and Quentin's Demon (1969), Barnabas Collins and the Gypsy Witch (1969), Barnabas Collins the Invisible Ghost (1969), Barnabas Collins vs. the Warlock (1969), Box: 17, Folder: 37. 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/230507 Accessed May 16, 2024.