Iron mining in Minnesota.
Wedi'i Gadw mewn:
| OCLC: | 1183382 |
|---|---|
| Prif Awdur: | |
| Iaith: | English |
| Cyhoeddwyd: |
Minneapolis,
1912.
|
| Cyfres: | The University of Minnesota. Minnesota school of mines. Experiment station. Bulletin no. 1.
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| Pynciau: | |
| Fformat: | Monograph Note that CRL will digitize material from the collection when copyright allows. |