Business Flying for Commerce and Agriculture. Madison, Wis.: Business Flying, Inc., August 1952

Business Flying for Commerce and Agriculture. Madison, Wis.: Business Flying, Inc., August 1952, Volume: Gilbert D143. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525408 Accessed December 27, 2025.