Azizah S, Budiwirman B. The Historical Site of Mbah Soero Coal Mine Pit Sawahlunto, West Sumatra, as a Learning Resource for Social Science Education. langgam [Internet]. 21Mar.2025 [cited 4Apr.2025];4(1):13-0. Available from: http://langgam.ppj.unp.ac.id/index.php/jurnal/article/view/208