FATHULLIANSYAH, Noor; JUHRANI, Juhrani; SANTI, Irnita Rosaria; HADI, Irfan. PERHITUNGAN MUATAN BATUBARA DENGAN METODE DRAFT SURVEY DI PT.TARUNA BETANG LABORATORIUM SERVIS. Pena Jangkar, [S. l.], v. 6, n. 1, p. 52–60, 2026. DOI: 10.54315/pj.v6i1.235. Disponível em: https://jurnal.amnus-bjm.ac.id/index.php/pena-jangkar/article/view/235. Acesso em: 5 nov. 2026.