00337nam a2200097Ia 4500008004100000082001800041100001400059245009900073260005900172300000800231140113s9999    xx            000 0 und d  a543:001.8   L  aAnonymous  a"Changes in official methods of analysis made at the 86th annual meeting, October 12-15, 1972"  a1970bThe Association of Official ChemistscWashington  a447