AGHASTYA, Adya. Planning and Normalization of Ring Drainage in Railways at the Indonesian Railway Academy of Madiun. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), [S. l.], v. 2, n. 2, p. 76–86, 2018. DOI: 10.37367/jpi.v2i2.6. Disponível em: https://jurnal.ppi.ac.id/jpi/article/view/6. Acesso em: 29 apr. 2024.