Bit gage v. drilling speed

Author: Mosier, McHenry.
Additional Authors: Agnew, Wing G.
Year: 1939
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3447
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3447
Subjects: Drilling and boring
Bits (Drilling and boring)
Links: https://hdl.handle.net/2027/mdp.39015078491969
https://hdl.handle.net/2027/mdp.39015078492256

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