Donor
- R. B. Bernard4 objects
- R. W. Hanna71 objects
- Ralph C. Shanks3 objects
- Ralph L. Likins4 objects
- Raymond W. Ickes1 objects
- Redding Museum of Art and History2 objects
- Richard L. Greene1 objects
- Richard L. Phillips9 objects
- Richard Lerner5 objects
- Richard Seaton2 objects
- Rita M. Angle1 objects
- Robert Addison1 objects
- Robert B. Hawkins18 objects
- Robert Dennis3 objects
- Robert Dettmer17 objects
- Robert Durden2 objects
- Robert E. Jones1 objects
- Robert E. Shore2 objects
- Robert Fleming Heizer360 objects
- Robert G. Ecob1 objects