File:Operations Control from 1941 pamphlet.jpg

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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
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Original publication: Air Ministry pamphlet

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

(Life time: 70 years from publication (see http://www.caret.cam.ac.uk/copyright/Page171.html))
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(Reusing this file)		 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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current18:49, 9 January 2014Thumbnail for version as of 18:49, 9 January 2014585 × 900 (181 KB)Maury Markowitz (talk | contribs){{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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