1. Color matching in dentistry. II. Practical applications of the organization of color;Sproull;J Prosthet Dent,1973
2. The science and art of dental ceramics;McLean,1979
3. Current status of shade selection and color matching;Preston;Quintessence Int,1985
4. Proposed guidelines for the acceptance program for dental shade guides;Wozniak,1987
5. Color discrimination of twelve observers;Brown;J Opt Soc Am,1957