Heffner, Rickye, Comparative Study of Sound Localization in Mammals, KU# 4916-5, NS17850, September 1, 1986-August 31, 1987, Box: 42, Folder: 32. 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/454056 Accessed July 12, 2025.