D. Settasuwacha1 และผู้แต่งคนอื่นๆ. (2017) Investigation of Approaching Speed at Highway-Railway Grade Crossing: Songkhla Case Study. <i>NARESUAN UNIVERSITY ENGINEERING JOURNAL</i>, <i>12</i>(1), 9-16.D. Settasuwacha1 และผู้แต่งคนอื่นๆ. "Investigation of Approaching Speed at Highway-Railway Grade Crossing: Songkhla Case Study". NARESUAN UNIVERSITY ENGINEERING JOURNAL 12 (2017):9-16.D. Settasuwacha1 และผู้แต่งคนอื่นๆ. Investigation of Approaching Speed at Highway-Railway Grade Crossing: Songkhla Case Study. Faculty of Engineeing Naresuan University:ม.ป.ท. 2017.