1992DIN EN 26352:1992-02 Ferronickel; determination of nickel content; dimethylglyoxime gravimetric method (ISO 6352:1985); german version EN 26352:1991
1992DIN EN 26352:1992 Ferronickel; determination of nickel content; dimethylglyoxime gravimetric method (ISO 6352:1985); german version EN 26352:1991