Hubble Space Telescope Observations of Globular Clusters in M31.I.Color- Magnitude Diagrams, Horizontal Branch Metallicity Dependence, and the Distance to M31
Journal article published in 1996 by
E. A. Ajhar,
C. J. Grillmair,
T. R. Lauer 
,
W. A. Baum,
S. M. Faber,
J. A. Holtzman,
C. R. Lynds,
E. J. O'Neil
,
W. A. Baum,
S. M. Faber,
J. A. Holtzman,
C. R. Lynds,
E. J. O'Neil
