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- [1] OXIDATION OF TANTALUM AND NIOBIUM IN TEMPERATURE-RANGE 400 DEGREES 600 DEGREES C JOURNAL OF THE LESS-COMMON METALS, 1973, 30 (02): : 249 - 258
- [2] OXIDATION OF NIOBIUM IN TEMPERATURE RANGE 350 DEGREES - 500 DEGREES C JOURNAL OF METALS, 1968, 20 (12): : A31 - &