31st Photographic Reconnaissance Squadron - Emblem
United States Army Air Forces
1944
Mauer, Mauer (1969), Combat Squadrons of the Air Force, World War II, Air Force Historical Studies Office, Maxwell AFB, Alabama. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-89201-097-5" title="Special:BookSources/0-89201-097-5">ISBN 0-89201-097-5</a>