Author: | Ertl, Tell. |
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Additional Authors: | Burgh, Ernest E., Wagner, John R., |
Year: | 1948 |
Document Type: | BMRA |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.23:4177 |
Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 4177 |
Subject: | Bits (Drilling and boring) |
Link: | https://hdl.handle.net/2027/mdp.39015078480392 |