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Churn-drill performance
| Author: | Thoenen, J. R. |
|---|---|
| Additional Authors: | Lintner, E. J. |
| Year: | 1947 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:4058 |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 4058 |
| Subjects: | Rock-drills--Testing |
| Quarries and quarrying--Equipment and supplies--Testing | |
| Link: | https://hdl.handle.net/2027/mdp.39015078493585 |
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