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NASA STI Repository (National Aeronautics and Space Administration) · 1972 · 20 citations · 0 references
Natural SciencesAstronomyPhysicsAstrophysicsPlanetary ScienceSpacecraft DesignComet AssayObserving StrategiesSky SurveysSolar PhysicsSpace ExplorationComet AstrometryCometary Infrared EmissionComets