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- [2] BVRI MAIN-SEQUENCE PHOTOMETRY OF THE GLOBULAR-CLUSTER M4 ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1984, 56 (01): : 19 - &
- [3] UBV PHOTOMETRY OF RR-LYRAE VARIABLES IN THE GLOBULAR-CLUSTER NGC-6121 (M4) ASTRONOMICAL JOURNAL, 1979, 84 (10): : 1542 - 1552
- [4] The main sequence of the globular cluster M4=NGC 6121 from CCD NTT photometry ASTRONOMICAL JOURNAL, 1997, 114 (01): : 189 - 197
- [5] A PHOTOELECTRIC SEQUENCE IN THE REGION OF THE GLOBULAR-CLUSTER NGC 5986 ASTRONOMY & ASTROPHYSICS, 1984, 139 (02): : 549 - 550
- [8] BVRI CCD PHOTOMETRY OF THE GLOBULAR-CLUSTER NGC 6362 ASTRONOMICAL JOURNAL, 1986, 91 (02): : 303 - &
- [10] BVRI CCD PHOTOMETRY OF THE GLOBULAR-CLUSTER M55 (NGC 6809) ASTRONOMICAL JOURNAL, 1992, 104 (01): : 190 - &