Apiratwarakul, K., Gaysonsiri, D. and Sukeepaisarncharoen, W. (2014) “A Comparative Study of the Start Time Between Using Radio and Bell Signals in Emergency Medical Services (EMS) Activation”, Srinagarind Medical Journal, 29(1), pp. 2–6. Available at: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/17278 (Accessed: 29 November 2022).