Francillon, René J. Lockheed Aircraft since 1913. London:Putnam, 1982. ISBN0-370-30329-6.
Hess, William N. and Jim Winchester. ""Boeing B-17 Flying Fortress:Queen of the Skies". Wings Of Fame. Volume 6. London:Aerospace Publishing, 1997. ISBN1-874023-93-X. ISSN 1361-2034. pp. 38–103.
Jones, Lloyd S. U.S. Bombers, B-1 1928 to B-1 1980s. Fallbrook, CA: Aero Publishers, 1962, second edition 1974. ISBN0-8168-9126-5.