Erickson, Thomas. "Equilibrium relations in the CaO-Al₂O₃-ZrO₂-SiO₂ system, especially in the ternary system CaO-ZrO₂-SiO₂ /." Doctoral dissertation, Ohio State University, 1970. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486662110464396Chicago Manual of Style (17th edition)