Tidatrut Vichaidid, Thongchai Soodprasert, & Teerasak Verapaspong. (2007). Calibration of HPGe Gamma-Ray Planar Detector System for Radioactivity Standards. Agriculture and Natural Resources, 41(5), 198–202. Retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/244368