BLUE HORIZONTAL-BRANCH STARS OF M15, M92, M13, AND M3

[31] PETERSEN JO, 1966, MAT FYS MEDD DAN VID, V34

[32] A COARSE ANALYSIS OF 3 RR LYRAE STARS [J]. ASTROPHYSICAL JOURNAL, 1961, 134 (02) : 633 - &

[33] Roman N. G., 1955, AP J SUPPL, V2, P195

[34] AN INDICATION OF GAPS IN GIANT BRANCH OF GLOBULAR CLUSTER M15 [J]. ASTROPHYSICAL JOURNAL, 1968, 153 (2P2) : L129 - &

[35] 3-COLOR PHOTOMETRY OF BRIGHT STARS IN GLOBULAR CLUSTER M92 [J]. ASTROPHYSICAL JOURNAL, 1966, 143 (02) : 313 - &

[36] REDDENING, AGE DIFFERENCE, AND HELIUM ABUNDANCE OF GLOBULAR CLUSTERS M3, M13, M15, AND M92 [J]. ASTROPHYSICAL JOURNAL, 1969, 157 (2P1) : 515 - &

[37] A 4-COLOR PHOTOMETRIC SYSTEM APPLIED TO LINE BLANKETING OF SUBDWARFS [J]. ASTROPHYSICAL JOURNAL, 1963, 137 (04) : 1057 - &

[38] THE COLOR-MAGNITUDE DIAGRAM FOR THE GLOBULAR CLUSTER-M3 [J]. ASTRONOMICAL JOURNAL, 1953, 58 (03) : 61 - 75

[39] THE GLOBULAR CLUSTER NGC-4147 [J]. ASTRONOMICAL JOURNAL, 1955, 60 (06) : 230 - 236

[40] SANDAGE AR, 1964, OBSERVATORY, V84, P245

[31] PETERSEN JO, 1966, MAT FYS MEDD DAN VID, V34

[32] A COARSE ANALYSIS OF 3 RR LYRAE STARS [J]. ASTROPHYSICAL JOURNAL, 1961, 134 (02) : 633 - &

[33] Roman N. G., 1955, AP J SUPPL, V2, P195

[34] AN INDICATION OF GAPS IN GIANT BRANCH OF GLOBULAR CLUSTER M15 [J]. ASTROPHYSICAL JOURNAL, 1968, 153 (2P2) : L129 - &

[35] 3-COLOR PHOTOMETRY OF BRIGHT STARS IN GLOBULAR CLUSTER M92 [J]. ASTROPHYSICAL JOURNAL, 1966, 143 (02) : 313 - &

[36] REDDENING, AGE DIFFERENCE, AND HELIUM ABUNDANCE OF GLOBULAR CLUSTERS M3, M13, M15, AND M92 [J]. ASTROPHYSICAL JOURNAL, 1969, 157 (2P1) : 515 - &

[37] A 4-COLOR PHOTOMETRIC SYSTEM APPLIED TO LINE BLANKETING OF SUBDWARFS [J]. ASTROPHYSICAL JOURNAL, 1963, 137 (04) : 1057 - &

[38] THE COLOR-MAGNITUDE DIAGRAM FOR THE GLOBULAR CLUSTER-M3 [J]. ASTRONOMICAL JOURNAL, 1953, 58 (03) : 61 - 75

[39] THE GLOBULAR CLUSTER NGC-4147 [J]. ASTRONOMICAL JOURNAL, 1955, 60 (06) : 230 - 236

[40] SANDAGE AR, 1964, OBSERVATORY, V84, P245