NASA NTRS · 19660020366
Geoastronomical observations
Abstract
Visual geoastronomical observations by astronauts aboard Mercury and Gemini orbital flights
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Dunkelman, L., Gill, J. R., Mercer, R. D., Roach, F. E.. 1966-01-01. Geoastronomical observations. https://ntrs.nasa.gov/citations/19660020366
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