Niwat Klinngam. (1987) Consequences of population changes on compulsory education in Thailand : 1986-1996. National Institute of Development Administration,:ม.ป.ท.Niwat Klinngam. 1987. Consequences of population changes on compulsory education in Thailand : 1986-1996. ม.ป.ท.:National Institute of Development Administration,;Niwat Klinngam. Consequences of population changes on compulsory education in Thailand : 1986-1996. ม.ป.ท.:National Institute of Development Administration, 1987. Print.