KÜP, F. COMPARISON OF PLOUGHSHARE BOLTS HARDNESS AND COEFFICIENT OF FRICTION PROPERTIES. International Journal of Research -GRANTHAALAYAH, [S. l.], v. 7, n. 5, p. 1–9, 2019. DOI: 10.29121/granthaalayah.v7.i5.2019.817. Disponível em: https://www.granthaalayahpublication.org/journals/granthaalayah/article/view/IJRG19_A05_2277. Acesso em: 3 may. 2024.