Columbium
By: Henry E. Stipp
Contributors: United States. Bureau of Mines
Series: Mineral commodity profiles -- MCP-10; Mineral commodity profiles -- MCP-10.
Publisher: U.S. Department of the Interior, Bureau of Mines; Publications Distribution Branch, Bureau of Mines
Published: 1978
Place of publication: Pittsburgh, Pa
Language: eng
Subjects: Niobium; Niobium ores
Notes: "Prepared by the Bureau of Mines, U.S. Department of the Interior."

"January 1978"--Cover.

Bibliography : p. 12.