| Author: | Adams, William W. |
|---|---|
| Year: | 1921 |
| Document Type: | N/A |
| SUDOC: | I 28.7:275 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Technical Paper 275 |
| Subjects: | Mine accidents -- United States. |
| Quarries and quarrying -- United States. | |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc66445/ |