Official Short Wave Log and Call Book. Mount Morris, Ill.: Popular Book Corp., August 1933

Official Short Wave Log and Call Book. Mount Morris, Ill.: Popular Book Corp., August 1933, Volume: Gilbert D915. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526912 Accessed December 28, 2025.