Wingquist, Carl F. <br/><br/>
Conical bit rotation as a function of selected cutting parameters / 
Wingquist, Carl F. 
 - [Pittsburgh, Pa.] :  U.S. Dept. of the Interior, Bureau of Mines,  1985. 
 - 18 p. :  ill. ;  28 cm. 
 - Report of investigations / United States Department of the Interior, Bureau of Mines ;  8983 .
 - Report of investigations (United States. Bureau of Mines) ;  8983. .
<br/><br/>Bibliography: p. 13. 
<br/><br/><label>LCCN: </label>85600120  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bits (Drilling and boring)--Testing.<br/>Coal mining machinery--Testing.
<br/><br/><label>LC Class. No.: </label>TN23  TN279  / .U43 no. 8983 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.23 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:8983