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calumet and hecla mining company

Michigan copper district strike

By United States. Department of Labor.

"Calumet-conglomerate."

By Edwin J. Hulbert

Strike in the copper mining district of Michigan

By United States. Department of Labor.

Calumet & Hecla pay office

By

Albert S. Bigelow, complainant, vs. the Calumet & Hecla Mining Company and the Osceola Consolidated Mining Company, defendants

By Albert S. Bigelow

Albert S. Bigelow, plaintiff, vs. the Calumet & Hecla Mining Company and the Osceola Consolidated Mining Company, defendants ...

By Albert S. Bigelow