1. Uranium resources, production and demand, joint OECD/NEA-IAEA Report, Paris, 1979.
2. H. Kaplan, Bastnaesite-barite-fluorite complex ore deposite in near-south of Eskişehir-Sivrihisar-Kizilcaören village, MTA (Mineral Research and Exploration Institute of Turkey) Rept. No: 477, 1977 (in Turkish).
3. B. Ipekoĝlu, Evaluation of Eskişehir-Beylikahir ore, Ph.D. Thesis, Technical University of Istanbul, 1983 (in Turkish).
4. H. Onishi, Photometric Determination of Traces of Metals, Vol. 3, Part IIB, A Wiley-Interscience Publication, USA, 1989.
5. E. B. Sandell, Colorimetric Determination of Traces of Metals, Vol. 3, Part I, Interscience Publishers, Inc., New York, 1959.