Pawaree Kompayak. (2004) A comparative study of dust exposure to pulmonary function impairment of sugar mill workers. Mahidol University,:ม.ป.ท.Pawaree Kompayak. 2004. A comparative study of dust exposure to pulmonary function impairment of sugar mill workers. ม.ป.ท.:Mahidol University,;Pawaree Kompayak. A comparative study of dust exposure to pulmonary function impairment of sugar mill workers. ม.ป.ท.:Mahidol University, 2004. Print.