"Calumet-conglomerate." An exploration and discovery
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
[Ontonagon, Mich.]
Ontonagon-miner press
[1893]
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| Subjects: | |
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| Item Description: | Caption title: History of the discovery of the Calumet and Hecla mining co.'s copper-bearing-conglomerate. A series of letters originally published in the Ontonagon-miner, Michigan, in the year 1893. |
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| Physical Description: | 148 p. 22 cm. |