Mitchell, David R. <br/><br/>
Coal preparation. 

 - 2nd ed.  
 - New York :  The American Institute of Mining and Metallurgical engineers,  1950. 
 - The seely W. Mudd series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Carbon
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622.333