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The Avro 631 Training Airplane (British): A Two-Seat Light Biplane
| Year: | 1932 |
|---|---|
| Document Type: | N/A |
| Series: | NACA Aircraft Circulars |
| Report Number: | NACA-AC-161 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc279489/ |
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