Author: | Hill, James E. |
---|---|
Year: | 1947 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:7394 |
Series: | Information circular / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 7394 |
Subject: | Drilling and boring |
Link: | https://hdl.handle.net/2027/mdp.39015078535682 |