Tilas Paper-27 Regnall, 1977, 1978, 1980, 1984, 1985, 1986, 1987, Box: 34, Folder: 2. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/149969 Accessed April 23, 2024.