Investment Analysis of Excavator in Sand Mining on the Slopes of Mount Merapi. Momentum International Journal of Civil Engineering (MIJCE), [S. l.], v. 1, n. 2, p. 63–71, 2025. DOI: 10.64123/mijce.v1.i2.4. Disponível em: https://journal.marasofipublishing.co.id/index.php/mijce/article/view/67. Acesso em: 26 oct. 2025.