ROLLASTIN, Boy. Material Biokomposit Sebagai Material Alternatif Sungkup Helm. Manutech : Jurnal Teknologi Manufaktur, [S. l.], v. 9, n. 01, p. 6–11, 2019. DOI: 10.33504/manutech.v9i01.24. Disponível em: https://ejournal.polman-babel.ac.id/index.php/manutech/article/view/24. Acesso em: 22 sep. 2026.