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- Dates:
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1921?
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1921
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1922
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
Correspondence, description of helicopter and drawing
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- Dates:
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Oct.-Nov. 1922
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1924
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1929
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1938-1942
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
Contained In:
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- Dates:
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1939
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1940
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
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- Dates:
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1940
- Level:
- file
- Collection ID:
- NASM.XXXX.0173
- Repository:
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National Air and Space Museum Archives
Compiled and published by the Lockheed Aircraft Corp.