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- [5] POLAROGRAPHIC DETERMINATION OF COPPER NICKEL AND COBALT IN ROCKS INDUSTRIAL LABORATORY, 1965, 31 (10): : 1478 - &
- [8] SUCCESSIVE COLORIMETRIC DETERMINATION OF SMALL AMOUNTS OF COBALT COPPER AND NICKEL JAPAN ANALYST, 1971, 20 (12): : 1565 - &
- [9] POLAROGRAPHIC-DETERMINATION OF NICKEL AND COBALT IN IRON-MANGANESE NODULES INDUSTRIAL LABORATORY, 1989, 55 (12): : 1355 - 1357