A Abdulla, M., A. Hatim, N. and K. Al-Khayat, I. 2009. Modification of Gypsum Products (Part II): The Effect of Drying Methods on The Compressive Strength and Surface Hardness of Modified Gypsum Products. Al-Rafidain Dental Journal. 9, 2 (Sep. 2009), 162–167. DOI:https://doi.org/10.33899/rden.2009.9107.