TRI HERIYADI, N. W. A. A.; TANIA, D. POLA SEBARAN BATUBARA FORMASI NANGGULAN KABUPATEN KULONPROGO DAERAH ISTIMEWA YOGYAKARTA. JURNAL TEKNOLOGI TECHNOSCIENTIA, [S. l.], v. 10, n. 2, p. 155–162, 2018. DOI: 10.34151/technoscientia.v10i2.95. Disponível em: https://ejournal.akprind.ac.id/index.php/technoscientia/article/view/95. Acesso em: 25 nov. 2024.