HARIANJA, Dedy; DAMANIK, Muhammad Ridha Syafii; RESTU, Restu. Kajian Tingkat Pencemaran Air di Kawasan Perairan Danau Toba Desa Silima Lombu Kecamatan Onanrunggu Kabupaten Samosir. JURNAL GEOGRAFI, [S. l.], v. 10, n. 2, p. 176–183, 2018. DOI: 10.24114/jg.v10i2.10534. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/geo/article/view/10534. Acesso em: 7 jun. 2025.