Kuakul Marhotorn และ Punya Charusiri. (2008) Petrochemistry of igneous rocks in the southern parts of the Chatree, Changwat Pichit. Chulalongkorn University:ม.ป.ท.Kuakul Marhotorn และ Punya Charusiri. 2008. Petrochemistry of igneous rocks in the southern parts of the Chatree, Changwat Pichit. ม.ป.ท.:Chulalongkorn University;Kuakul Marhotorn และ Punya Charusiri. Petrochemistry of igneous rocks in the southern parts of the Chatree, Changwat Pichit. ม.ป.ท.:Chulalongkorn University, 2008. Print.