1. Abdel-Khalek, N.A., Omar, A.M.A., & Hassan Y. (1996). Froth flotation of ultrafine Egyptian kaolin ore. In M. Kemal, V. Arslan, A. Akar, & M. Canbazoglu (Eds), Changing Scopes in Mineral Processing, (pp. 395-400). AA Belkama, Rotterdam.
2. Akdeniz, N., & Konak, N. (1979). Rock units of the Menderes Massif around Simav and location of metabasic and metaultrabasic rocks. TJK Bulletin, 22, 175-184. (in Turkish).
3. Alpar, S.R., Gürgey, İ., Rodopman, K., & Ustaer, C. (1973). Treatment of sulfate and pyrite containing kaolin minerals, TÜBİTAK, Engineering Research Group, MAG-246. (in Turkish).
4. Al-Zahrani, A.A., & Abdul-Majid, M.H. (2009). Extraction of alumina from local clays by hydrochloric acid process. Journal of King Abdulaziz University: Engineering Science, 20(2), 29-41.
5. Ambikadevi, V.R., & Lalithambika, M. (2000). Effect of organic acids on ferric iron removal from iron-stained kaolinite. Applied Clay Science, 16, 133-145.