Bowen, Lee (1959). Vol. I, Project Silverplate 1943–1946(PDF). The History of Air Force Participation in the Atomic Energy Program, 1943–1953. Washington, D.C.: U.S. Air Force, Air University Historical Liaison Office. Diarsipkan dari asli(PDF) tanggal 2014-02-22. Diakses tanggal 28 July 2013. ;
Campbell, Richard H. (2005). The Silverplate Bombers: A History and Registry of the Enola Gay and Other B-29s Configured to Carry Atomic Bombs. Jefferson, North Carolina: McFarland & Company. ISBN0-7864-2139-8. OCLC58554961.
Coster-Mullen, John (2012). Atom Bombs: The Top Secret Inside Story of Little Boy and Fat Man. Waukesha, Wisconsin: J. Coster-Mullen. OCLC298514167.
Dvorak, Darrell F. (22 December 2012). "The other atomic bomb commander: Colonel Cliff Heflin and his "Special" 216th AAF Base Unit". Air Power History. 59 (4): 14–27. ISSN1044-016X.
Jones, Vincent (1985). Manhattan: The Army and the Atomic Bomb(PDF). Washington, D.C.: United States Army Center of Military History. OCLC10913875. Diarsipkan dari asli(PDF) tanggal 2014-10-07. Diakses tanggal 25 August 2013. ;
Lewis, Robert A.; Tolzer, Eliot (August 1957). "How We Dropped the A-Bomb". Popular Science. hlm. 71–75, 209–210.
Ramsey, N. F. (2012). "History of Project A". Dalam Coster-Mullen, John (ed.). Atom Bombs: The Top Secret Inside Story of Little Boy and Fat Man. United States: J. Coster-Mullen. OCLC298514167.