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- [5] SOLVENT-EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF GALLIUM WITH PYROCATECHOL VIOLET JAPAN ANALYST, 1972, 21 (06): : 752 - &
- [6] SOLVENT EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF INDIUM (III) WITH PYROCATECHOL VIOLET JAPAN ANALYST, 1971, 20 (06): : 689 - &