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A simple device for measurement of angles of azimuth and deviation from the horizontal on glass tubes used for surveying diamond-drill holes
| Author: | Townsend, James W. |
|---|---|
| Year: | 1947 |
| Document Type: | BMRA |
| Issuing Agency: | United States Bureau of Mines, |
| SUDOC: | I 28.23:4062 |
| Series: | Report of investigations / Bureau of Mines ; |
| Report Number: | 4062 |
| Subject: | Borings |
| Links: | https://hdl.handle.net/2027/mdp.39015078497438 |
| no.4051-4070 1947 |
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