KURNIA RAPA, Menahim Fajar; PAMBUDI , Noorhan Firdaus. Integrating Lean Six Sigma and Soil Quality Preservation in Topsoil Removal Operations: A Case Study of Indonesian Coal Mining. Devotion : Journal of Research and Community Service, [S. l.], v. 7, n. 8, p. 1014–1031, 2026. DOI: 10.59188/devotion.v7i8.25755. Disponível em: https://devotion.greenvest.co.id/index.php/dev/article/view/25755. Acesso em: 5 aug. 2026.