Normansyah, N. dan Anhar, M. 2021. Uji Kekerasan Bahan Gear Sprocket Dengan Campuran Timah (Sn). Journal of Applied Mechanical Engineering and Renewable Energy. 1, 1 (Feb 2021), 16-19. DOI:https://doi.org/10.52158/jamere.v1i1.80.