Roberta Gellis - Off World (1977), Sing Witch (1973), Paul Garrison - Hot Air Balloons (1978), Gliders (1977), Box: 8, Folder: 2. 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/229696 Accessed May 05, 2024.