Kovscek, P. D. <br/><br/>
Testing of a diesel-powered impact cutting head for hard-rock mining / 
by P.D. Kovscek, C.D. Taylor and H. Handewith. 
 - [Washington, D.C.] :  Bureau of Mines, U.S. Dept. of the Interior,  [1991]. 
 - 16 p. 
 - Report of investigations ; 9374 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining machinery--Testing.<br/>Free piston engines--Testing.