00298nam a2200097Ia 4500008004100000082001600041100002800057245006700085260003900152300000900191140113s9999    xx            000 0 und d  a543   K6.3B  a"Welcher,Frank. J.,Ed."  a"Standard Methods of chemical analysis vol.III B, 6th edition"  a1966bD Van Nostrand Co.cNew York  a2018