TY - CONF A1 - Vogl, Jochen T1 - Isotope Reference Materials - Basic Principles and Examples T2 - 14th International Symposium on Biological and Environmental Reference Materials T2 - 14th International Symposium on Biological and Environmental Reference Materials CY - National Harbor, Maryland 20745 USA DA - 2015-10-11 PY - 2015 AN - OPUS4-34481 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -