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- [23] CCD VRI photometry of the old open cluster NGC 7142 ADVANCES IN ASTRONOMY AND SPACE PHYSICS, 2012, 2 (01): : 11 - 14
- [24] BV CCD PHOTOMETRY OF THE OLD OPEN CLUSTER NGC 2243 ASTRONOMICAL JOURNAL, 1991, 101 (06): : 2102 - 2125
- [26] Multicolor CCD photometry of supergiants in the disk of NGC 628 ASTRONOMICAL JOURNAL, 1996, 111 (06): : 2280 - &
- [29] CCD PHOTOMETRY OF STARS IN THE OLD OPEN CLUSTER NGC-188 ASTRONOMICAL JOURNAL, 1990, 99 (01): : 261 - 272