Sureeporn Pumpang. 2007. Trapiche sapphire from some deposits in Thailand, Cambodia and Vietnam. Field of Study Geology, Chulalongkorn University;
Sureeporn Pumpang. (2007) Trapiche sapphire from some deposits in Thailand, Cambodia and Vietnam . Chulalongkorn University/Bangkok.
Sureeporn Pumpang. Trapiche sapphire from some deposits in Thailand, Cambodia and Vietnam. . Bangkok:Chulalongkorn University, 2007.
Sureeporn Pumpang. (2007) Trapiche sapphire from some deposits in Thailand, Cambodia and Vietnam . Chulalongkorn University/Bangkok.