The proper motion and the distance of the Praesepe cluster.
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| OCLC: | 12876748 |
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| 语言: | English |
| 出版: |
Groningen,
Hoitsema Brothers,
1927.
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| 主题: | |
| 格式: | Thesis Monograph Note that CRL will digitize material from the collection when copyright allows. |