Front Cover and Preface Vol. 4 No. 1. JTERA (Jurnal Teknologi Rekayasa), [S. l.], v. 4, n. 1, p. i-iv, 2019. DOI: 10.31544/jtera.v4.i1.2019.i-iv. Disponível em: https://jtera.polteksmi.ac.id/index.php/jtera/article/view/251. Acesso em: 13 jun. 2026.