Emblem of the 553d Bombardment Squadron
United States Army Air Force
1942
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/0892010975" title="Special:BookSources/0892010975">ISBN 0892010975</a>