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- [24] PRACTICE-ORIENTATED REFINING OF STEEL MELTS WITH RARE-EARTH ELEMENTS ARCHIV FUR DAS EISENHUTTENWESEN, 1982, 53 (01): : 5 - 12
- [25] ON BINARY ALUMINIUM-RICH COMPOUNDS OF RARE-EARTH ELEMENTS PHILIPS RESEARCH REPORTS, 1964, 19 (04): : 319 - &
- [26] RARE-EARTH ELEMENTS IN THE PLUTONIC AND DYKE ALKALINE ROCK SERIES OF THE NIZHNESAYANSKY CARBONATITE COMPLEX GEOKHIMIYA, 1994, (11): : 1591 - 1610
- [30] SOLUBILITY OF SOME CHELATES OF RARE-EARTH ELEMENTS IN MELTS OF ORGANIC-SUBSTANCES ZHURNAL NEORGANICHESKOI KHIMII, 1982, 27 (02): : 331 - 334