Arubol Chotipong. (1991) <The> Study of dust fall jar and high volume sampler's suitability for measuring dust concentration from cement plant. Mahidol University,:ม.ป.ท.Arubol Chotipong. 1991. <The> Study of dust fall jar and high volume sampler's suitability for measuring dust concentration from cement plant. ม.ป.ท.:Mahidol University,;Arubol Chotipong. <The> Study of dust fall jar and high volume sampler's suitability for measuring dust concentration from cement plant. ม.ป.ท.:Mahidol University, 1991. Print.