Aungtinee Kittiravechote and Thanida Sujarittham (2020) “Measuring the Acceleration of Gravity Using a Smartphone, A4-Papers, and a Pencil ”, International Journal of Advanced Science and Technology, 29(7s), pp. 884 - 889. Available at: http://sersc.org/journals/index.php/IJAST/article/view/9995 (Accessed: 20September2024).