((en))Hansell, Haywood S., The Strategic Air War Against Germany and Japan, ISBN 0-912799-39-0 Chapter 6, page 256: The total inventory of B-29s on hand in the Army Air Forces was about 3,700. ...On the basis of photo coverage, intelligence estimated that 175 square miles of urban area in 66 cities were wiped out. Total civilian casualties stemming directly from the urban attacks were estimated at 330,000 killed, 476,000 injured, and 9,200,000 rendered homeless.
"Recommendations for Continued Study of the Atomic Bomb Casualties", Papers of James V. Neel, M.D., Ph.D. Manuscript Collection No. 89 of the Houston Academy of Medicine, Texas Medical Center Library.
