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1Published 1978Subjects: “...Orbiting astronomical observatories....”
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2Published 1974Subjects: “...Orbiting geophysical observatories....”
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3Published 1983Subjects: “...Orbiting astronomical observatories....”
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4Published 1990Subjects: “...Orbiting astronomical observatories....”
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5by Silva, Bárbara K.Subjects: “...Astronomical observatories Chile History....”
Published 2019
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6Published 1971Subjects: “...Orbiting astronomical observatories....”
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7by Leverington, David, 1941-Subjects: “...Astronomical observatories. http://id.loc.gov/authorities/subjects/sh85008999...”
Published 2016
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8Published 1990Subjects: “...Orbiting astronomical observatories....”
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9Published 1990Subjects: “...Orbiting astronomical observatories....”
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10Published 1845Subjects: “...United States Naval Observatory....”
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11Published 1878Subjects: “...United States Naval Observatory....”
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12Published 1878Subjects: “...United States Naval Observatory....”
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13Published 1880Subjects: “...United States Naval Observatory....”
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14Published 1894Subjects: “...United States Naval Observatory....”
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15Published 1892Subjects: “...United States Naval Observatory....”
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16Published 1910Subjects: “...United States Naval Observatory....”
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17Published 1910Subjects: “...United States Naval Observatory....”
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18Published 1930Subjects: “...United States Naval Observatory....”
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19Published 1930Subjects: “...United States Naval Observatory....”
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20Published 1966Subjects: “...United States Naval Observatory....”
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