1. Rait, J. R., Basic Refractories, Illife & Sons, London (1950).
2. Nurse, R. W., Proc. of the 3rd Inst. Symposium on the Chemistry of Cement; Cement and Concrete Assn., London, pp 56–90 (1952).
3. Bogue, R. H, The Chemistry of Portland Cement, Rienhold Publishing Co., New York (1955).