Proper motions in the field of the open cluster NGC 6939 / R. D. Cannon and A. G. Purcell
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| Superior document: | Royal Observatory bulletins 158 |
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| VerfasserIn: | |
| Place / Publishing House: | London : Science Research Council, 1970 |
| Year of Publication: | 1970 |
| Language: | English |
| Series: | Royal Observatory bulletins
158 |
| Physical Description: | S. 69 - 81; graph. Darst. |
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| ac_no: | AC08263147 |
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| Hierarchical level: | Monograph |
| Statement of Responsibility: | R. D. Cannon and A. G. Purcell |