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Abyan, M.I., Nuryaman, A., Jihad, B.H. , Junjunan, S.F. and Asmiati, A. 2022. Design Optimization of Propellant Grain and Nozzle Contour to Improve Performance of Solid Rocket Propulsion. Journal of Engineering and Technological Sciences. 54, 5 (Sep. 2022), 220508. DOI:https://doi.org/10.5614/j.eng.technol.sci.2022.54.5.8.