Sotthisawad, Kaewkanlaya
Mahakhan, Polson
Vichitphan, Kanit
Vichitphan, Sukanda
Sawaengkaew, Jutaporn
Funding for this research was provided by:
Incubation Researcher Project of Khon Kaen University
Center for Alternative Energy Research and Development of Khon Kaen University
Sakon Nakhon Rajabhat University