| INI L. | |
| by | BELLONI T. |
| Astron. Astrophys., 336, 902-910 (1998) | |
| Optical identification of ROSAT sources in M 67: activity in an old cluster. | |
| o | <BVS NNa> (Nos 11a-11b). <[PB98] BNN-A> (Nos B1-A, B1-B, B2-A, B2-B, B15-A). |
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