Zaidan, Shihab, and Shahad Abdull-Razzak. “Effect of Bentonite Addition on Some Properties of Porcelain”. Journal of Engineering 25, no. 1 (December 30, 2018): 84-99. Accessed September 20, 2020. http://joe.uobaghdad.edu.iq/index.php/main/article/view/j.eng.2019.01.07.