Suwit Numpa. 2003. A study of factors related to abnormal pulmonary function among the various plywood dust exposures. Field of Study Industrial Hygiene and Safety, Mahidol University;
Suwit Numpa. (2003) A study of factors related to abnormal pulmonary function among the various plywood dust exposures . Mahidol University/Bangkok.
Suwit Numpa. A study of factors related to abnormal pulmonary function among the various plywood dust exposures. . Bangkok:Mahidol University, 2003.
Suwit Numpa. (2003) A study of factors related to abnormal pulmonary function among the various plywood dust exposures . Mahidol University/Bangkok.