Emblem of the USAAF 91st Strategic Reconnaissance Wing
United States Army Air Force
Approved 28 December 1952
USAF Historical Research Agency  Maurer, Maurer. Air Force Combat Units Of World War II. Maxwell Air Force Base, Alabama: Office of Air Force History, 1983. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-912799-02-1" title="Special:BookSources/0-912799-02-1">ISBN 0-912799-02-1</a>.