A laboratory comparison of drag cutting methods in hard rock /Author: Anderson, Sterling J.
Publisher: Pittsburgh, Pa. : U.S. Dept. of the Interior, Bureau of Mines,
Date: 1987. This title can be found in 1 Iowa libraries.
Drag bit cutting characteristics using sintered diamond inserts /Author: Roepke, Wallace W.
Publisher: Pgn. [i.e. Pittsburg], Pa. : U.S. Dept. of the Interior, Bureau of Mines,
Date: 1983. This title can be found in 1 Iowa libraries.
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