3d Air Instructional Center - Main -photo mosaics
Air Service, United States Army photograph
1918
US National Archives, Gorrell's History of the American Expeditionary Forces Air Service, Series L Miscellaneous Sections of the Air Service  Volume 12 Photostats, Maps, and Photographs Accompanying the History of the Design and Projects Section via <a rel="nofollow" class="external free" href="http://www.fold3.com">http://www.fold3.com</a>