Mitchell, David R. <br/><br/>
Coal preparation, 
edited by David R. Mitchell. 
 - 2nd ed. 
 - New York :  American Institute of Mining and Metallurgical Engineers,  1950. 
 - xi, 830 p.  ill. ;  24 cm. 
 - The Seeley W. Mudd series .
<br/><br/> "Sponsored by the Seeley W. Mudd Memorial Fund." 
<br/><br/>Includes bibliographical references . 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal preparation.