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Original Articles

Origin and Properties of Oltu Gemstone Coal

Pages 1279-1284 | Published online: 28 Aug 2007

References

  • American Society for Testing and Materials . 1991 . Annual Book of ASTM Standards. Section 5: Petroleum Products, Lubricants, and Fossil Fuels. 5.05: Gaseous Fuels: Coal and Coke
  • Ciftci , E. , Coskun , S. and Yalcinalp , B. Oltustone-mineralogical and physical properties . 55th Geological Congress of Turkey . March 11–15 , Ankara, Turkey.
  • Ciftci , E. , Yalcin , M. G. , Yalcinalp , B. and Kolayli , H. Mineralogical and physical characterization of the Oltustone, a gemstone occurring around Oltu (Erzurum-Eastern Turkey) . International Congress on Applied Mineralogy (ICAM 2004) . September 19–22 , Brazil.
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