Usawadee Ongarjwutichai และ Somsak Siwadamrongpong. (2010) Design & Analysis and Standard Time Study of Jig for Bus Chassis Production. <i>KKU Engineering Journal</i>, <i>37</i>(4), 319-328.Usawadee Ongarjwutichai และ Somsak Siwadamrongpong. "Design & Analysis and Standard Time Study of Jig for Bus Chassis Production". KKU Engineering Journal 37 (2010):319-328.Usawadee Ongarjwutichai และ Somsak Siwadamrongpong. Design & Analysis and Standard Time Study of Jig for Bus Chassis Production. Faculty of Engineering, Khon Kaen Univeristy:ม.ป.ท. 2010.