A. Al-Hemiri, Adil, and Yousif Jawad. “Differences Between Sodium Metasilicate and Silicic Acid As Silica Source for Zeolite Y Nano Particles Synthesis by Sol- Gel Method”. Iraqi Journal of Chemical and Petroleum Engineering 10, no. 4 (December 30, 2009): 13–17. Accessed December 23, 2024. https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/416.