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Recent Progress in the Thawing of Frozen Gravel in Placer Mining
| Author: | Janin, Charles |
|---|---|
| Year: | 1922 |
| Document Type: | N/A |
| SUDOC: | I 28.7:309 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Technical Paper 309 |
| Subjects: | Placer mining. |
| Gold mines and mining -- United States. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc66453/ |
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