Speed; A Magazine Devoted to the Progress of Air Travel in All Parts of the World. Los Angeles, California: Western Air Express, March 1930

Speed; A Magazine Devoted to the Progress of Air Travel in All Parts of the World. Los Angeles, California: Western Air Express, March 1930, Volume: Gilbert D974. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527548 Accessed December 27, 2025.