Natthakit Siriwongthawan. 2002. Appropriate technology assessment for factors affecting the decreasing of pulmonary function of traffic policemen in inner Bangkok Metropolitan area : a case study of Metropolitan Police Division 6. Field of Study Appropriate Technology for Resource Development, Mahidol University;
Natthakit Siriwongthawan. (2002) Appropriate technology assessment for factors affecting the decreasing of pulmonary function of traffic policemen in inner Bangkok Metropolitan area : a case study of Metropolitan Police Division 6 . Mahidol University/Bangkok.
Natthakit Siriwongthawan. Appropriate technology assessment for factors affecting the decreasing of pulmonary function of traffic policemen in inner Bangkok Metropolitan area : a case study of Metropolitan Police Division 6. . Bangkok:Mahidol University, 2002.
Natthakit Siriwongthawan. (2002) Appropriate technology assessment for factors affecting the decreasing of pulmonary function of traffic policemen in inner Bangkok Metropolitan area : a case study of Metropolitan Police Division 6 . Mahidol University/Bangkok.