1. “Elements of Optical Mineralogy,”;Winchell,1951
2. “Sedimentary Petrography,”;Milner,1952
3. “Nonmetallic Minerals,”;Ladoo,1951
4. A. I. M. E. Committee on Industrial Minerals. “Industrial Minerals and Rocks,” 2nd ed. Am. Inst. Mining Met. Engrs. New York. 1949.
5. “Properties of Silica.”;Sosman,1927