Columbium
Subtitle: a chapter from Mineral facts and problems, 1985 edition.
Contributors: United States. Bureau of Mines.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1985
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 12
Subjects: Niobium.; Mines and mineral resources -- United States.
Other titles: Mineral facts and problems.
Notes: At head of title: Bureau of Mines preprint from Bulletin 675.

Bibliography: p. 12.