Simons, Theodore  1857-, <br/><br/>
Ore dressing :  Principles and practice / 
By Theodore simons 
 - 292 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Preparación mecánica de minerales
<br/><br/><label>LC Class. No.: </label>TN500  / S55