Rule, Albert R. <br/><br/>
Recovery of fluorine from low-grade calcareous fluorspar: Preliminary studies 
Rule, Albert R.; Blake Jr., H. E.  
 - Washington  Bureau of mines  1974 
 - 6 p. 
 - RI 7866 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERALOGIA<br/>MINERALOGY
<br/><br/><label>Subjects--Index Terms: </label>MINERALES CARBONATADO MINERALES DE FLUORITA FLUOR CARBONATE MINERALS FLUORSPAR ORES FLUORINE 
<br/><br/><label>Universal Decimal Class. No.: </label>549