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Image: Operations Control from 1941 pamphlet

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Description: 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
Title: Operations Control from 1941 pamphlet
Credit: Original publication: Air Ministry pamphlet Immediate source: http://ww2today.com/2nd-april-1941-the-battle-of-britain-defined
Author: UK Air Ministry (Life time: 70 years from publication (see http://www.caret.cam.ac.uk/copyright/Page171.html))
Permission: 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."
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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