Ross - Phantom Manor (1965), Phantom of Belle Acres (1972), Phantom of Fog Island (1970), Phantom of Glencourt (1971), Box: 17, Folder: 42. 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/230512 Accessed May 16, 2024.