"Controllable Pitch Propellers", Box: 8b, Folder: 7a. Carl B. Allen Papers Regarding Early Aviation, A&M 2252. West Virginia and Regional History Center.
Cite Item Description
"Controllable Pitch Propellers", Box: 8b, Folder: 7a. 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/94479 Accessed November 03, 2024.