Alton, Charles T. 1942- The Economics of dry season irrigation in northeast Thailand [microform] / by Charles Thomas Alton - Ann Arbor, Mich. : University Microfilms International, 1978 - 1 microfilm reel : positive ; 35 mm. Thesis (Ph.D.) - University of Kentucky, 1977 Subjects--Topical Terms: Irrigation--Economic aspects--Thailand