Young, George Joseph,  1876-, <br/><br/>
Elements of minig / 
by George J. Young ... 
 - 4 
 - 755 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ingeniería de minas
<br/><br/><label>LC Class. No.: </label>TN146  / Y71946