Upady Hatthasin. (2019) Assessment on Design of a Talking Distance Measuring Wheel for the Visually Impaired Students. <i>Mahasarakham International Journal of Engineering Technology</i>, <i>5</i>(2), 70-74.Upady Hatthasin. "Assessment on Design of a Talking Distance Measuring Wheel for the Visually Impaired Students". Mahasarakham International Journal of Engineering Technology 5 (2019):70-74.Upady Hatthasin. Assessment on Design of a Talking Distance Measuring Wheel for the Visually Impaired Students. Faculty of Engineering, Mahasasakham University:ม.ป.ท. 2019.