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- [2] A RAPID METHOD FOR CARRIER-FREE DETERMINATION OF INDIVIDUAL RARE EARTHS BY ION EXCHANGE AT ROOM TEMPERATURE JOURNAL OF CHROMATOGRAPHY, 1967, 29 (01): : 203 - &
- [4] THE SEPARATION OF RARE EARTHS BY ION EXCHANGE TRANSACTIONS OF THE AMERICAN INSTITUTE OF MINING AND METALLURGICAL ENGINEERS, 1959, 215 (03): : 457 - 463