A picture on two pages of "The Night Hamburg Died", Martin Caidin, Four Square/New English Library, London, 1966.
Originally published in USA by Ballatine Books, Inc, 1960
Text on the previous page reads:
(Note that Caidin has worked for US "intelligence":
(Next page) The heart of the firestorm area; a picture taken by the
Germans soon after the attack. The buried vehicles are gutted firetrucks that had to
be abandoned because of the heat.
National Fire Protection Association
In Japan for two years with the Intelligence and Public
Information offices of the U.S. 5th Air Force, Mr. Caidin
toured the devastated Japanese cities, and spent much time in Hiroshima,
where the world's first atomic bomb used in the war was dropped.
ibid., page 157)