"Commemorating the First Transport Helicopter flight on September 6, 1948"- CBA was a passenger, 1948-09-06

"Commemorating the First Transport Helicopter flight on September 6, 1948"- CBA was a passenger, 1948-09-06, Box: 12, Folder: 3. 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/94688 Accessed November 03, 2024.