Magnetic observations of sunspots 1917 - 1924 / 2 / George E. Hale ; Seth B. Nicholson
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| Superior document: | Magnetic observations of sunspots 1917 - 1924 2 |
|---|---|
| VerfasserIn: | |
| Place / Publishing House: | Washington, DC : Carnegie Institution of Washington, 1938 |
| Year of Publication: | 1938 |
| Language: | English |
| Physical Description: | 692 S.; Ill. |
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