Kampol Adulavidhaya. Interregional competition in agricultural production in Thailand [microform] / Kamphol Adulavidhaya. - Ann Arbor, Mich. : University Microfilms International, 1970. - 1 microfilm reel : positive ; 35 mm. Thesis (Ph.D.) - Purdue University, 1970. Subjects--Topical Terms: Agricultural--Economic aspects--Thailand.Agricultural--Thailand.