| Author: | O'Harra, B. Marvel |
|---|---|
| Year: | 1924 |
| Document Type: | N/A |
| SUDOC: | I 28.23:2575 |
| Series: | Report of investigations (United States. Bureau of Mines) |
| Report Number: | Report 2575 |
| Subjects: | Lignite |
| Char | |
| Zinc ores -- Metallurgy | |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc1393304/ |