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Document Designation and Title Year Select Item(s) D2798 Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal 11 D2798 Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal 09a D2798 Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal 09 D2798 Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal 06 D2798 Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal 05 D2798 Standard Test Method for Microscopical Determination of the Reflectance of Vitrinite in a Polished Specimen of Coal 99(2004) D2798 Standard Test Method for Microscopical Determination of the Reflectance of Vitrinite in a Polished Specimen of Coal 99