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- Tantalum (and Columbium)
- Separation of tantalum-columbium by solvent extraction
- Separation of chloride vapors during ilmenite chlorination
- Separation of tantalum from columbium by the hydrofluoric acid-sulfuric acid-methyl isobutyl ketone system
- Effects of interstitial impurity levels on mechanical properties of columbium at low temperatures
- Separating tantalum and columbium by solvent extraction :HF- HCl-Diethyl ketone system
- Columbium and tantalum:a materials survey
- Field test for columbium
- Preparation of columbium and tantalum by metallic reduction of their chlorides
- Electrorefining of columbium
- X-ray spectrographic analysis for trace quantities of tantalum in columbium
- Thermodynamic data for columbium (niobium) carbide
- Analysis of high-purity columbium by optical emission spectrography
- Extraction of tantalum and columbium from ores and concentrates by chlorination
- Vapor pressures of liquid columbium (2,740⁰ to 3,140⁰ K) and liquid hafnium (2,500⁰ to 2,810⁰ K) / by R.K. Koch, W.E. Anable, and R.A. Beall.
- Microflotation studies of some columbium-tantalum minerals
- Separation of columbium, tantalum, titanium, and zirconium from titanium chlorination residues
- Nitride intermediates in the preparation of columbium, vanadium, and tantalum metals(in two parts) :
- Nitride intermediates in the preparation of columbium, vanadium, and tantalum metals(in two parts) :