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Standard Reference Data, NIST:
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NIST data activities that support stewardship of the environment include remediation of environmental problems through the development of measurements, data, and models. NIST has served as a partner for both industry and measurement laboratories for many years in dealing with environmental concerns by providing the tools needed for sustainable development and the shared goals of environmental protection and socio-economic growth.
The codes in the list below have the following meanings:
NIST Interactive Algorithm for Isotopic CO2 Measurements, Online, DG, *