Analysis of Coliform and Colifecal Contamination on Sanjai Chip Using MPN Method. JURNAL PROTEKSI KESEHATAN, [S. l.], v. 11, n. 1, p. 52–56, 2022. DOI: 10.36929/jpk.v11i1.433. Disponível em: https://jurnal.pkr.ac.id/JPK/article/view/433. Acesso em: 18 jan. 2026.