TY - JOUR AU - William Kelly AU - Bruce MacDonald AU - Stefan Leigh C2 - Journal of ASTM International DA - 2008-10-16 14:10:10 LA - en PB - Journal of ASTM International PY - 2008 TI - Determination of Sulfur In Fossil Fuels: User Prepared Standards With Concentrations And Uncertainties Traceable to NIST Values ER -