Skinner, Eugene H. <br/><br/>
Tunnel boring technology: disk cutter experiments in metamorphic and igneous rocks 
Skinner, Eugene H.; Conway, John P.; Waddell, Galen G. 
 - Washington  Bureau of mines  1974 
 - 87 p. 
 - RI 7962 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>MINING
<br/><br/><label>Subjects--Index Terms: </label>MECANICA DE ROCAS DEFORMACION DE LA ROCA ROCK MECHANICS ROCK DEFORMATION 
<br/><br/><label>Universal Decimal Class. No.: </label>622