TY - RPRT TI - Standard Reference Materials : Value assignment and uncertainty estimation of selected light stable isotope reference materials / AU - Klinedinst, Donna B AU - Verkouteren, R Michael PY - 2003 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 260-149 DO - 10.6028/NIST.SP.260-149 ER -