TY - JOUR AU - Kelly, William AU - MacDonald, Bruce AU - Leigh, Stefan C2 - Journal of ASTM International DA - 2006-11-01 LA - en M1 - in press PB - Journal of ASTM International PY - 2006 TI - User Prepared Standards for Fossil Fuels with Concentrations and Uncertainties Traceable to NIST Values ER -