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File:Operations Control from 1941 pamphlet.jpg

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摘要

描述
English: An illustration of the "Dowding System" of defensive air control, from a 1941 Air Ministry pamphlet. In the lower left is the overall control system at Fighter Command HQ at Bentley Priory, shown dis
日期
来源

Original publication: Air Ministry pamphlet

Immediate source: http://ww2today.com/2nd-april-1941-the-battle-of-britain-defined
作者

UK Air Ministry

(Life time: 70 years from publication (see http://www.caret.cam.ac.uk/copyright/Page171.html))
授权
(二次使用本文件)		 For "Works of unknown authorship", the copyright expires "70 years from the end of the calendar year in which the work is made. However, if the work is made available to the public during that time then copyright expires 70 years from the end of the calendar year in which it is first made publicly available."


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or

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当前2014年1月9日 (四) 18:492014年1月9日 (四) 18:49版本的缩略图585 × 900（181 KB）Maury Markowitz{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|An illustration of the "Dowding System" of defensive air control, from a 1941 Air Ministry pamphlet.}} |Source = '''Original publication''': Air Ministry pamphlet<br/> '''Immed...

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