Smith Thaicharoen. (1991) Socio-economic change resulting from promotion of gem-cutting in the Northeast region : a case study of Khon-Kaen province. Mahidol University,:ม.ป.ท.Smith Thaicharoen. 1991. Socio-economic change resulting from promotion of gem-cutting in the Northeast region : a case study of Khon-Kaen province. ม.ป.ท.:Mahidol University,;Smith Thaicharoen. Socio-economic change resulting from promotion of gem-cutting in the Northeast region : a case study of Khon-Kaen province. ม.ป.ท.:Mahidol University, 1991. Print.