Safety inspections in and around iron mines in the Lake Superior district / by F.S. Crawford.

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Bibliographic Details
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Main Author: Crawford, F. S. (Frank Stevens), 1889-
Corporate Author: United States. Bureau of Mines
Format: Government Document Book
Language:English
Published: Washington, D.C. : U.S. Dept. of Commerce, Bureau of Mines, 1931.
Series:Information circular (United States. Bureau of Mines) ; 6507.
Subjects:
Description
Item Description:At head of title: Department of Commerce--Bureau of Mines.
No.6501-6525 issued bound together.
Physical Description:7 pages : illustrations ; 27 cm.