Findings:
- Feldspar
- plagioclase feldspar
- feldspar (user)
- Aeronautics to Astronautics: NACA Research (1952 - 1957)
- NACA Moves Toward Space
- From NACA to NASA (November 1957 - September 1958)
- NACA's Metamorphosis Begins
- NACA Makes Ready
- NACA
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