| Author: | Morrell, Roger J. | 
|---|---|
| Additional Authors: | Swanson, David E., Larson, David A. | 
| Year: | 1985 | 
| Document Type: | BMRA | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.23:9003 | 
| Series: | Report of investigations / United States. Bureau of Mines ; | 
| Report Number: | 9003 | 
| Subjects: | Mining machinery | 
| Rock mechanics | |
| Drag bits (Drilling and boring)--Testing | |
| Link: | https://hdl.handle.net/2027/mdp.39015078489310 |