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Punya Charusiri and others. 1996. Petrochemistry of probable gem-bearing basalts in Sop Prap-Ko Kha area, Changwat Lampang. Bangkok:Chulalongkorn University;
Punya Charusiri and others. (1996) Petrochemistry of probable gem-bearing basalts in Sop Prap-Ko Kha area, Changwat Lampang. Chulalongkorn University:Bangkok.
Punya Charusiri and others. Petrochemistry of probable gem-bearing basalts in Sop Prap-Ko Kha area, Changwat Lampang. Bangkok:Chulalongkorn University, 1996. Print.
Punya Charusiri and others. (1996) Petrochemistry of probable gem-bearing basalts in Sop Prap-Ko Kha area, Changwat Lampang. Chulalongkorn University:Bangkok.