Isranuri, I. et al. 2019. Development of Drum Brake Pad Material Motorcycle Based Composite Hazelnut Shells, Aluminum and Pineapple Leaf Fibers with Polyurethane Matrix. International Journal of Engineering & Technology. 8, 1.1 (Jan. 2019), 6–12. DOI:https://doi.org/10.14419/ijet.v8i1.1.24774.