Davis, Thomas L. (Thomas Leonard), 1947-Ketyungyoenwong, Boonsom2007-01-032022-02-032007-01-032022-02-031992https://hdl.handle.net/11124/785071992 Spring.Includes illustrations (some color), map.Includes bibliographical references.masters thesesengCopyright of the original work is retained by the author.Text