Wongsirojkul, Wasan, Decho Thong-Aram, and Attaporn Pattarasumunt. 2014. “The development of computer peripheral device for radiation survey with a GPS locator”. Engineering and Applied Science Research 40 (3):417-25. https://ph01.tci-thaijo.org/index.php/easr/article/view/21730.