- Third U.S. Army Outline Plan – Operation Overlord, Annex No. 3 – Troop Priority List, Page 14
- By Timothy Foote
- The U.S. Army Center of Military History, William M. Hammond
- Mediterranean And European Theaters Of Operation In World War II, Gene Thorp
- Mediterranean And European Theaters Of Operation In World War II, Gene Thorp
- Mediterranean And European Theaters Of Operation In World War II, Gene Thorp
- United States Army In World War II, The European Theater of Operations, The Supreme Command, Forrest C. Pogue, Page 324, June 6, 1944
- Special Annex A - Third U.S. Army Outline Plan To Operation Overlord Annex No. 8-G-2 Plan Page 64
- Serving In Harm's Way, A Record of My Service In The U.S. Army and WWII, Byron G. Rogers jr., January 2006
- W. U. (Doc) Savage Letter, December 15, 1949
- PFC Harry G. MacDuffee, B Battery, 244th Field Artillery - Battery Record
- W. U. (Doc) Savage Letter, December 15, 1949
- Department of The Army, USH&EC, USAMHI, 202-244th 1945, “History of The 244th Field Artillery Battalion During World War II
- U.S. Army Military History Institute, Archives Branch, Colonel Davis Papers
- Department of The Army, USH&EC, USAMHI, 202-244th 1945, “History of The 244th Field Artillery Battalion During World War II
- PFC Harry G. MacDuffee, B Battery, 244th Field Artillery - Battery Record
- SERVING IN HARM'S WAY, A Record of My Service In The U.S. Army and WWII, Byron G. Rogers jr., January 2006
- PFC Harry G. MacDuffee, B Battery, 244th Field Artillery - Battery Record