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- [24] Photographic photometry of stars in the poorly studied globular cluster NGC 6139 ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 1996, 22 (05): : 686 - 696
- [25] VR CCD Photometry of Variable Stars in the Globular Cluster NGC 4147 ASTRONOMICAL JOURNAL, 2019, 158 (01):
- [26] CCD photometry of variable stars in the field of the globular cluster NGC 6397 ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (01): : 1 - 7
- [27] PHOTOMETRY OF STARS OF CASSIOPEIA-TAURUS GROUP ASTROPHYSICAL JOURNAL, 1963, 137 (02): : 523 - &
- [29] CCD PHOTOMETRY OF STARS IN THE OLD OPEN CLUSTER NGC-188 ASTRONOMICAL JOURNAL, 1990, 99 (01): : 261 - 272
- [30] CCD photometry of faint variable stars in the globular cluster NGC 6752 ASTRONOMICAL JOURNAL, 1999, 118 (01): : 462 - 467