Heffner, Rickye, Comparative Study of Sound Localization in Mammals, KU# 4916-0706-3, NS17850-03, February 2, 1984-December 31, 1985, Box: 42, Folder: 27. 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/454051 Accessed July 19, 2025.