John Ngangsi Ngah, Julius K. Tangka, Mathias N.W. EVINA. HOMEMADE HELICOPTER DESIGN AND VIBRATIONAL ANALYSIS. Int. j. innov. eng. res. technol. [Internet]. 2022 Feb. 16 [cited 2024 May 19];9(02):5-17. Available from: https://repo.ijiert.org/index.php/ijiert/article/view/3031