DIN 50504:1973 Chemical analysis of copper and copper alloys; photometric determination of iron in copper and copper alloys containing 0,4 % of iron at maximum
1973DIN 50504:1973-10 Chemical analysis of copper and copper alloys; photometric determination of iron in copper and copper alloys containing 0,4 % of iron at maximum
1973DIN 50504:1973 Chemical analysis of copper and copper alloys; photometric determination of iron in copper and copper alloys containing 0,4 % of iron at maximum