Front Cover and Preface Vol. 6 No. 1. JTERA (Jurnal Teknologi Rekayasa), [S. l.], v. 6, n. 1, p. i-iv, 2021. DOI: 10.31544/jtera.v6.i1.2021.i-iv. Disponível em: https://jtera.polteksmi.ac.id/index.php/jtera/article/view/517. Acesso em: 10 jun. 2026.