ULLAH, M. F. .; MAHMOOD, K.; AKRAM, M. S. Coal mining trends and future prospects: A case study of Eastern Salt Range, Punjab, Pakistan. Journal of Himalayan Earth Sciences, [S. l.], v. 51, n. 2, p. 87-93, 2018. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1862. Acesso em: 24 apr. 2025.