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Evolution of the Helicopter
| Author: | Balaban, Karl |
|---|---|
| Year: | 1923 |
| Document Type: | N/A |
| Series: | NACA Technical Memorandums |
| Report Number: | NACA-TM-196 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc53094/ |
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