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- [5] NIOBIUM (5) CHELATES WITH OXALATE AND TARRATE IN AQUEOUS SOLUTION ZEITSCHRIFT FUR CHEMIE, 1969, 9 (09): : 345 - +
- [8] Applications of Solvent Extraction to Hydrometallurgy - 7. Tantalum and Niobium. Revista de Metalurgia (Madrid), 1982, 18 (02): : 109 - 118
- [9] OXO AND PEROXO COMPLEXES OF VANADIUM, NIOBIUM AND TANTALUM WITH SOME AMINOPOLYCARBOXYLIC AND ALPHA-AMINO-ACIDS ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1980, 180 (AUG): : 146 - INOR