Bova - Millennium (1972), Forward in Time (1974), Who (1956, 1969, 1980), Unexpected Dimension (1974), Box: 2, Folder: 77. 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/230044 Accessed May 24, 2024.