Rule, Albert R. <br/><br/>
Removal of magnesium impurities from phosphate rock concentrates 

 - Washington  Bureau of Mines  1970 
 - 12 p.  il  26 cm 
 - RI  7362 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>magnesium<br/>phosphate rocks
<br/><br/><label>Universal Decimal Class. No.: </label>622