"Coast to Coast by Plane and Train," illustrated map, Transcontinental Air Transport, Inc., nd.

"Coast to Coast by Plane and Train," illustrated map, Transcontinental Air Transport, Inc., nd., Box: 10. 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/106307 Accessed December 20, 2024.