Al Hadad AS, Al Huwaizi AF, Al Huwaizi RF. The Surface Hardness Measurement of Stone and Improved Die Stone After the Addition of a Mixture of Chemical Additives with Different Proportion. J Bagh Coll Dent [Internet]. 2018 Mar. 15 [cited 2024 May 3];30(1):1-4. Available from: https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/2433