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1
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2Published 1961“...HD 6902 .N532 fs...”
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4
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5
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6
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10Published 1978“...HD 6902 .T7635...”
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11Published 1978“...HD 6905 .W4 .T763...”
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14Published 1980“...HD 8039 .P152 .N5 .M484...”
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16
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18Published 1981“...HD 6490 .R4 .N532...”
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20