Integrated photographic magnitudes of sixty-eight globular clusters

[1] BECKER W, 1938, FORTSCHRITTE ASTRONO, V1, P50

[2] *HARV OBS, 1930, HARV OBS MON, V2

[3] *LUND OBS, 1932, 5 LUND OBS

[4] SEARES, MT W CONTR, V587

[5] SEARES, 1935, PASADENA

[6] SEARES, 1938, AP J, V87, P257

[7] SEARES, 1925, AP J, V61, P284

[8] SEARES, MT W CONTR, V288

[9] STEBBINS, 1938, AP J, V87, P237

[10] STEBBINS, MT W CONTR, V586

[1] BECKER W, 1938, FORTSCHRITTE ASTRONO, V1, P50

[2] *HARV OBS, 1930, HARV OBS MON, V2

[3] *LUND OBS, 1932, 5 LUND OBS

[4] SEARES, MT W CONTR, V587

[5] SEARES, 1935, PASADENA

[6] SEARES, 1938, AP J, V87, P257

[7] SEARES, 1925, AP J, V61, P284

[8] SEARES, MT W CONTR, V288

[9] STEBBINS, 1938, AP J, V87, P237

[10] STEBBINS, MT W CONTR, V586