AL AJILI, M.; ABBAS, J. Manufacturing of speed reducer bars (break discs and bumzes) for vehicles and tractors using local raw materials. Journal of Education and Science, [S. l.], v. 17, n. 3, p. 44–50, 2005. DOI: 10.33899/edusj.2005.82406. Disponível em: https://tanmiyat.uomosul.edu.iq/index.php/edusj/article/view/42313. Acesso em: 8 sep. 2025.