Wiard, Edward Saxon  1876-, <br/><br/>
The theory and practice of ore dressing / 
By Edward s. wiard 
 - 426 páginas 
 - Mining library ;  v. 6 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Preparación mecánica de minerales
<br/><br/><label>LC Class. No.: </label>TN500  / W53