Hasalli Hj Ibrahim, N.; Dzulhelmy bin Amari, M.; Sharmila Shamsuddin, Z. Study of Subsonic Airfoil Based on the Assessment of Lift- To-Drag (L D) Force Ratio. IJET 2019, 8 (1.1), 53-58. https://doi.org/10.14419/ijet.v8i1.1.24780.