Nopanom Kaewhanam และ Prasat Juntasan; Somkiat Narong. (2015) Evaluation of Highway Subgrade Compaction by Dynamic Cone Penetrometer. <i>Mahasarakham International Journal of Engineering Technology</i>, <i>1</i>(1), 6-10.Nopanom Kaewhanam และ Prasat Juntasan; Somkiat Narong. "Evaluation of Highway Subgrade Compaction by Dynamic Cone Penetrometer". Mahasarakham International Journal of Engineering Technology 1 (2015):6-10.Nopanom Kaewhanam และ Prasat Juntasan; Somkiat Narong. Evaluation of Highway Subgrade Compaction by Dynamic Cone Penetrometer. Faculty of Engineering, Mahasasakham University:ม.ป.ท. 2015.