To the stockholders of the Calumet and Hecla Mining Company.
|Corporate Author:||Calumet and Hecla Mining Company.|
[Boston, Mass. : The Company], Dec. 1910.
Calumet and Hecla Mining Company
Calumet and Hecla Mining Company /
Industries > Industries / Michigan > Industries / Michigan / Keweenaw Peninsula
Copper mines and mining > Copper mines and mining / Michigan > Copper mines and mining / Michigan / Keweenaw Peninsula.
Explains consolidation plan.
23 p. :
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