Thongtip, Sakesun, and Arunpak Pitakpong. 2019. “Relationship Between Perception of Noise Protection and the Use of Hearing Protection Devices Among Stone-Mortar Workers in Phayao Province”. Srinagarind Medical Journal 34 (2):155-60. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/181346.