509th Composite Group
Lambang tahun 1946 dari 509th Composite Group saat menjadi bagian dari 58th Bombardment Wing, Very Heavy
Aktif	17 Desember 1944 – 10 Juli 1946
Negara	Amerika Serikat
Cabang	Pasukan Udara Angkatan Darat Amerika Serikat
Tipe unit	Bombardemen dan komposit transportasi udara
Peran	Perang atom
Jumlah personel	1767 personil, pesawat 15 B-29 dan 5 C-54
Bagian dari	313th Bombardment Wing Twentieth Air Force
Markas	North Field (Tinian), Kepulauan Mariana
Pertempuran	60px Perang Dunia II Kampanye Asia-Pasifik (1945)
Tokoh
Tokoh berjasa	Paul Tibbets

509th Composite Group (509 CG) adalah sebuah unit dari Pasukan Udara Angkatan Darat Amerika Serikat yang dibentuk pada Perang Dunia II dengan tugas khusus yaitu operasi senjata nuklir. Unit tersebut menghimpun serangan bom atom Hiroshima dan Nagasaki di Jepang pada Agustus 1945.

• 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. ISBN 0-7864-2139-8. OCLC 58554961. 
• Coster-Mullen, John (2012). Atom Bombs: The Top Secret Inside Story of Little Boy and Fat Man. Waukesha, Wisconsin: J. Coster-Mullen. OCLC 298514167. 
• Craven, Wesley Frank; Cate, James Lea, ed. (1953). Vol. V The Pacific: Matterhorn to Nagasaki – June 1944 to August 1945 (PDF). The Army Air Forces in World War II. Chicago, Illinois: University of Chicago Press. ISBN 0-912799-03-X. OCLC 256469807. Diakses tanggal 2 February 2012. 
• Krauss, Robert; Krauss, Amelia, ed. (2005). The 509th Remembered: A History of the 509th Composite Group as Told by the Veterans Themselves, 509th Anniversary Reunion, Wichita, Kansas October 7–10, 2004. Buchanan, Michigan: 509th Press. ISBN 978-0-923568-66-5. OCLC 59148135. 
• Lawren, William (1988). The General and the Bomb: A Biography of General Leslie R. Groves, Director of the Manhattan Project. New York: Dodd Mead. ISBN 0-396-08761-2. OCLC 16868107. 
• Maurer, Maurer (1983). Air Force Combat Units of World War II. Washington, D.C.: Office of Air Force History. ISBN 978-0-912799-02-5. OCLC 9644436. 
• Moody, Walton S. (1996). Building a Strategic Air Force (PDF). Washington, D.C.: Air Force History and Museums Program. OCLC 31900890. Diarsipkan dari versi asli (PDF) tanggal 2016-11-23. Diakses tanggal 31 August 2013. 
• Polmar, Norman (2004). The Enola Gay: The B-29 That Dropped the Atomic Bomb on Hiroshima. Washington, D.C.: Smithsonian National Air and Space Museum. ISBN 1-57488-859-5. 
• Rhodes, Richard (1986). The Making of the Atomic Bomb. New York: Simon & Schuster. ISBN 0-684-81378-5. OCLC 13793436. 
• Tibbets, Paul W. (1998). Return of the Enola Gay. New Hope, Pennsylvania: Enola Gay Remembered Inc. ISBN 0-9703666-0-4. OCLC 40566286. 
• Wainstock, Dennis (1996). The Decision to Drop the Atomic Bomb. Westport, Connecticut: Greenwood Publishing Group. ISBN 978-0-275-95475-8. OCLC 33243854. 
• Unknown (1945). History of 509th Composite Group – 313th Bombardment Wing – Twentieth Air Force – Activation to 15 August 1945 (PDF). Tinian: 509th CG (AFHRA archived). Diarsipkan dari versi asli (PDF) tanggal 27 January 2012. Diakses tanggal 1 February 2012. 

• Bowers, Peter M. (1999). Boeing B-29 Superfortress. Stillwater, Minnesota: Voyageur Press. ISBN 0-933424-79-5. 
• Dvorak, Darrell F. (2012). "The Other Atomic Bomb Commander: Colonel Cliff Heflin and his "Special" 216th AAF Base Unit" (PDF). Airpower Historian. Diarsipkan dari versi asli (PDF) tanggal 2016-03-27. Diakses tanggal 5 September 2015. 
• Mann, Robert A. (2004). The B-29 Superfortress: A Comprehensive Registry of the Planes and Their Missions. Jefferson, North Carolina: McFarland & Company. ISBN 0-7864-1787-0. OCLC 55962447. 
• Marx, Joseph L. (1967). Seven Hours to Zero. New York: G.P. Putnam Sons. OCLC 913500. 
• Ossip, Jerome J., ed. (1946). 509th Composite Group History – 509th Pictorial Album. Chicago, Illinois: Rogers Printing Company. OCLC 10065336. 
• Rowe, James L. (1978). Project W-47. Livermore, California: JA A RO Publishing. ISBN 0-9605562-0-6. 
• Thomas, Gordon; Morgan-Witts, Max (1977). Enola Gay. New York: Stein & Day Publishing. ISBN 0-8128-2150-5. 
• Wheeler, Keith (1982). Bombers over Japan. Virginia Beach, Virginia: Time-Life Books. ISBN 0-8094-3429-6. 

Wikimedia Commons memiliki media mengenai 509th Composite Group.

• Atomic Heritage Foundation
• 509th Composite Group Page, Atomic Heritage Foundation
• National Museum of the USAF B-29 Superfortress fact sheet