TY - SER AU - Schantz, Michele AU - Benner, Bruce AU - Chesler, S. AU - Christensen, Richard AU - Koster, B. AU - Kurz, J. AU - Parris, Reenie AU - Wise, Stephen C2 - National Oceanic and Atmospheric Administration, Silver Spring, MD DA - 1993-07-01 LA - en PB - National Oceanic and Atmospheric Administration, Silver Spring, MD PY - 1993 TI - NIST Methods for Certification of SRM 1941 and SRM 1974 ER -