National Glider; The Magazine of Practical Aviation. New York: Dime Publications, Inc., August 1930

National Glider; The Magazine of Practical Aviation. New York: Dime Publications, Inc., August 1930, Volume: Gilbert D687. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526794 Accessed December 27, 2025.