Tidarut Vichaidid, Thongchai Soodprasert, Natnalin Sastri, Chutima Oopathum and Pichet Limsuwan (2008) “Determination of U, Th and K in Sediments and Fossil Collected from Mae Moh Mine Using Gamma-Ray Spectrometry and Neutron Activation Analysis (NAA)”, Agriculture and Natural Resources. Bangkok, Thailand, 42(5), pp. 333–339. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/244616 (accessed: 10 October 2026).