Hafeez, Irfan, Muhammad Aamir, Saqib Nasir, Zaki- ud-din, Athar Amin, and Adnan Akram. “Bio-Physiochemical Beneficiation of Low Grade Coal from Lakhra Mine, (Sindh) Pakistan”. Journal of Asian Scientific Research 9, no. 10 (November 13, 2019): 173–184. Accessed April 29, 2024. https://archive.aessweb.com/index.php/5003/article/view/3932.