The image is from European War Reports of the United States Strategic Bombing Survey, MORALE DIVISION, 64b The Effects of Strategic Bombing on German Morale, Volume 1. (There are 2 Volumes)

[1] AIR 48 are US w:Strategic Bombing Survey reports. The image was therefore created by or for the US military, and is therefore PD. The other dates show that the report was covered by the UK Official Secrets Act and sealed for 30 years, being released to the public in 1974. The image is from the UK national archives, but the UK can not have had copyright on it.

本图片或文件是由美国空军的军人或雇员，基于其个人公务目的拍摄或制作的作品。作为美国联邦政府的作品，本图片或文件在美国属于公有领域。 العربية ∙ беларуская (тарашкевіца) ∙ català ∙ čeština ∙ Deutsch ∙ English ∙ español ∙ eesti ∙ فارسی ∙ suomi ∙ français ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ മലയാളം ∙ မြန်မာဘာသာ ∙ norsk bokmål ∙ Plattdüütsch ∙ Nederlands ∙ polski ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ српски / srpski ∙ svenska ∙ Türkçe ∙ українська ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−