| Author: | Weld, C. M. |
|---|---|
| Additional Authors: | Crane, W. R., Phalen, W. C., Newton, Edmund, van Barneveld, C. E., Christianson, Peter, Hunter, W. H. |
| Year: | 1920 |
| Document Type: | N/A |
| Issuing Agency: | United States. Bureau of Mines. |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 173 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc12369/ |