Observations on columbuim | Libros

Niobium (columbium) deposits of Canada

Robert B. Rowe

1958

Tantalum and niobium

George Leslie Miller

1959

The evolution of hydrogen from solutions of trivalent columbium in sulfuric acid ..

Robert Lee Fox

1934

The reduction of columbic acid and the measurement of the oxidation potential of the pentavalent-trivalent columbium system ..

Hart, David

1926

Extraction of tantalum and columbium from their ores ..

Leslie George Jenness

1930

Technology of columbium (niobium)

Symposium on Columbium (Niobium) (1958 Washington, D.C.)

1958

Tantalum and niobium

Keith Rodney Miles

1945