Operations Control from 1941 pamphlet

Autor:

UK Air Ministry

(Life time: 70 years from publication (see http://www.caret.cam.ac.uk/copyright/Page171.html))

Credit:

Original publication: Air Ministry pamphlet

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

Krótki link:

https://plwiki.pl/b/30073

źródło:

Wikimedia Commons

Wymiary:

585 x 900 Pixel (185274 Bytes)

Opis:

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

Licencja:

Public domain

Komentarz do licencji:

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."