Books
Forgotten Fifteenth: The Daring Airmen Who Crippled Hitler’s War Machine
He Wore a Pair of Silver Wings: The World War II Memoir of a Lightning Recon Pilot
Allied Photo Reconnaissance of World War II
Fifteenth Air Force Story … in World War II
World War II photo intelligence
Ostergaard, Albert J., Eyes Over Europe: The 32nd Photo Reconnaissance Squadron of San Severo, Italy, 1944–1945, Ellisville, MO, 1996 (Check WorldCat for available copies.)
Websites