00292nam a2200097Ia 4500008004100000082001300041245008400054250001000138260002500148700002100173220204s9999    xx            000 0 und d  a543bWIL 0aOfficial methods of analysis of the association of official analytical chemists  aEd.14  aVirginiabAOACc1984  aWilliams, Sidney