Pannapa Paotanom. 2002. Color quality classification of ruby and blue sapphire by CIELUV and Munsell color systems. Field of Study Imaging Technology, Chulalongkorn University;
Pannapa Paotanom. (2002) Color quality classification of ruby and blue sapphire by CIELUV and Munsell color systems . Chulalongkorn University/Bangkok.
Pannapa Paotanom. Color quality classification of ruby and blue sapphire by CIELUV and Munsell color systems. . Bangkok:Chulalongkorn University, 2002.
Pannapa Paotanom. (2002) Color quality classification of ruby and blue sapphire by CIELUV and Munsell color systems . Chulalongkorn University/Bangkok.