Imran, Muhammad, Najaf Ali, Hafiz Miqdad Masood, Muhammad Ashraf, and Waqar Ali. “Experimental Study of Coal Washability Using Float and Sink Test”. Journal of the Pakistan Institute of Chemical Engineers 49, no. 1 (July 12, 2021): 73–79. Accessed April 23, 2024. http://piche.org.pk/journal/index.php/jpiche/article/view/466.