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It is worthless when done
Article
It is worthless when done
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1 Total copies, 1 Copies are in, 0 Copies are out.
History of helicopter aviation with discussion of innovations by inventors, and aviation companies such as Bell Helicopter and Sikorsky.
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Title
It is worthless when done
Authors
Nelms, Douglas
Subjects
Helicopters-history
Language
English
Published
2004