EN ISO 6974-2:2002 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 2: Measuring-System Characteristics and Statistics for Processing of Data
2012EN ISO 6974-2:2012 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations (ISO 6974-2:2012)
2002EN ISO 6974-2:2002 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 2: Measuring-System Characteristics and Statistics for Processing of Data