The History and Development of Gold Dredging in Montana: with a Chapter on Placer-Mining Methods and Operating Costs
| Author: | Jennings, Hennen |
|---|---|
| Year: | 1916 |
| Document Type: | N/A |
| Issuing Agency: | United States. Bureau of Mines. |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 121 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc12327/ |