Gerezgiher, Alula Gebresas, Halefom Aregay Bsrat, Andrea Simon, and Tamás Szabó. 2019. “Development and Characterization of Sisal Fiber Reinforced Polypropylene Composite Materials”. International Journal of Engineering and Management Sciences 4 (1): 348-58. https://doi.org/10.21791/IJEMS.2019.1.43.