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- [45] The colorimetric determination of cobalt, nickel, iron and copper ZEITSCHRIFT FUR ANORGANISCHE CHEMIE, 1914, 86 (04): : 341 - 357
- [49] Colorimetric determination of phosphorus in steel and cast iron JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS, 1941, 26 (05): : 405 - 413