Carbide insert bit drilling at the Cleveland-Cliffs Iron Co. mines, Ishpeming, Mich.

Author: Lewis, Walter E.
Year: 1950
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7558
Series: Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number: 7558
Subjects: Carbide cutting tools
Drilling and boring machinery
Iron mines and mining--Michigan
Link: https://hdl.handle.net/2027/mdp.39015078455436

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