Richards, Robert H. <br/><br/>
Ore dressing 

 - New York  McGraw-hill Book Company  1903-1909 
 - 4 ts.  ilus.  Indice en volumen aparte 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERALES<br/>TRATAMIENTO
<br/><br/><label>Universal Decimal Class. No.: </label>A/622.7/R54