Calumet and Hecla, Inc.
| Role | Title | Holding Repository | |
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| referencedIn | Graton, L. C. (Louis Caryl), 1880-. Papers of Louis Caryl Graton, 1905-1963 (inclusive). | Harvard University Archives. |
| Role | Title | Holding Repository |
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| associatedWith | Graton, L. C. (Louis Caryl), 1880- | person |
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