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1
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2
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3Published 1977“...HD 5660 .N5 .E55...”
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4
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5Published 1971“...HD 5660 .N5 .N532 lw...”
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6
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7Published 1974“...HX 925 .A533...”
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8
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9Published 1976“...HD 5660 .N5 .N532...”
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10
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11
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12
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13Published 1975“...HD 5660 .N5 .S471...”
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14
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15
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16
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17
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18
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19
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20