Chaniya Somboon. 2006. Yellow coloration in heat-treated natural sapphires. Field of Study Geology, Chulalongkorn University;
Chaniya Somboon. (2006) Yellow coloration in heat-treated natural sapphires . Chulalongkorn University/Bangkok.
Chaniya Somboon. Yellow coloration in heat-treated natural sapphires. . Bangkok:Chulalongkorn University, 2006.
Chaniya Somboon. (2006) Yellow coloration in heat-treated natural sapphires . Chulalongkorn University/Bangkok.