English: Silhouette of the Yakolev Yak-11. The World's Fighting Planes (William Green and Gerald Pollinger, McDonald: London 1954) used 55 Crown Copyright silhouettes provided by the Controller of H.M. Stationery. An acknowledgements section on page 6 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.
Date
Source
The World's Fighting Planes, William Green and Gerald Pollinger, McDonald: London 1954
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{{Information |Description={{en|1=Silhouette of the Yakolev Yak-18. The World's Fighting Planes (William Green and Gerald Pollinger, McDonald: London 1954) used 55 Crown Copyright silhouettes provided by the Controller of H.M. Stationery. An acknowledgeme