February 11, 1931; "Our Status in the Air: Does america Lead or Lag in Military Type Planes?" , 1931

February 11, 1931; "Our Status in the Air: Does america Lead or Lag in Military Type Planes?" , 1931, Box: 3, Folder: 5. Carl B. Allen Papers Regarding Early Aviation, A&M 2252. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/94290 Accessed December 20, 2024.