Titima Charoentitirat. 1995. Fusulinacean faunas in permo-carboniferous limestones of the eastern part of Changwat Loei. Graduate School, Chulalongkorn University;
Titima Charoentitirat. (1995) Fusulinacean faunas in permo-carboniferous limestones of the eastern part of Changwat Loei . Chulalongkorn University/Bangkok.
Titima Charoentitirat. Fusulinacean faunas in permo-carboniferous limestones of the eastern part of Changwat Loei. . Bangkok:Chulalongkorn University, 1995.
Titima Charoentitirat. (1995) Fusulinacean faunas in permo-carboniferous limestones of the eastern part of Changwat Loei . Chulalongkorn University/Bangkok.