Tangpaisarn, T., Pungroong, D., Pholkerd, P., Klinpoon, K., Aksornmee, C., Phothisuwan, T., Sinsang, P., Kuhirunyaratn, P., & Pinitsoontorn, S. (2014). Proportions of Helmet Wearing in Medical Students KhonKaen University. Srinagarind Medical Journal, 29(4), 87. Retrieved from https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/23663