1. Annual Book of ASTM Standards. Gaseous Fuels; Coal and Coke, vol. 05.06. Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal;ASTM D2798-05,2005
2. Annual Book of ASTM Standards. Gaseous Fuels; Coal and Coke, vol. 05.06. Test Method for Moisture in the Analysis Sample of Coal and Coke;ASTM D3173-03,2005
3. Annual Book of ASTM Standards. Gaseous Fuels; Coal and Coke, vol. 05.06. Test Method for Ash in the Analysis Sample of Coal and Coke from Coal;ASTM D3174-04,2005
4. Annual Book of ASTM Standards. Gaseous Fuels; Coal and Coke, vol. 05.06. Test Method for Volatile Matter in the Analysis Sample of Coal and Coke;ASTM D3175-02,2005
5. Tracking the budget of Nb and Ta in the continental crust;Barth;Chemical Geology,2000