Duangrat Saowapark. 1996. Development of infrared spectroscopy technique for deposited carbon study. Bangkok:Chulalongkorn University;
Duangrat Saowapark. (1996) Development of infrared spectroscopy technique for deposited carbon study (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Duangrat Saowapark. Development of infrared spectroscopy technique for deposited carbon study. Bangkok:Chulalongkorn University, 1996.
Duangrat Saowapark. (1996) Development of infrared spectroscopy technique for deposited carbon study (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.