Willi A. Brand Juris Meija Manfred Gröning Norman E. Holden Michael Berglund Paul De Bievre Robert D. Loss Thomas Prohaska Thomas Walczyk Tyler B. Coplen 2013 IUPAC Commission on Istopic Abundances and Atomic Weights' spreadsheet of Standard Atomic Weights. application/pdf en International Union of Pure and Applied Chemistry Table of standard atomic weights 2013 reports