AMER, ASHRAF M. “?ACHIEVEMENTS IN BENEFICIATION AND PROCESSING OF LOW GRADE GRAPHITE DEPOSITS, EGYPT”. Biological Sciences - PJSIR 39, no. 1-4 (February 19, 1996): 76–80. Accessed June 8, 2025. http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/2378.