Mineral transformation of Thar and Lakhra Coals: Enhancing GCV and BTU for Sustainable energy applications. Mehran Univ. res. j. eng. technol. [Internet]. 2026 Oct. 1 [cited 2026 Oct. 23];45(4):162-8. Available from: https://murjet.muet.edu.pk/index.php/home/article/view/830