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English: Percival Prentice T.1 silhouette. The 1952 edition of the Observer's Book of Aircraft used 34 Crown Copyright silhouettes provided by the Controller of H.M. Stationery. An acknowledgements section on page 5 of the book identifies them by page. This image is one of those and since the publication date is pre-1957 is in the public domain.
Source
The Observer's Book of Aircraft 1952, William Green and Gerald Pollinger, Fredericke Warne & Co London 1952
Author
Crown Copyright
Licensing
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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to remix – to adapt the work
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attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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This work created by the United Kingdom Government is in the public domain.
This is because it is one of the following:
It is a photograph taken prior to 1 June 1957; or
It was published prior to 1974; or
It is an artistic work other than a photograph or engraving (e.g. a painting) which was created prior to 1974.
HMSO has declared that the expiry of Crown Copyrights applies worldwide (ref: HMSO Email Reply) More information.
See also Copyright and Crown copyright artistic works.
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{{Information |Description={{en|1=Percival Prentice T.1 silhouette. The 1952 edition of the Observer's Book of Aircraft used 34 Crown Copyright silhouettes provided by the Controller of H.M. Stationery. An acknowledgements section on page 5 of the book i
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