Heffner, Rickye, Comparative Study of Sound Localization in Mammals, KU# 4916-0706, NS17850, May 18, 1984, Box: 42, Folder: 28. University of Kansas Schiefelbusch Institute for Life Span Studies records, RG 35. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/454052 Accessed July 13, 2025.