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Open Skies
Astronomy, Observations and TechniquesHistory and Philosophical Foundations of PhysicsHistory of SciencePhilosophical Foundations of Physics and AstronomyRadio Astronomy in the USANRAORadio astronomers
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Public-domain status shown for GLOBAL. OAPEN open-access record with explicit license: CC-BY
Public-domain status shown for GLOBAL. OAPEN open-access record with explicit license: CC-BY