Coal preparation and use :  a world review 9th International Coal Preparation Congresses, 1982, New Delhi, India / 
chief editor S. Raja Rao 
 - Rotterdam :  A. A. Balkema,  1982 
 - 246 p. :  ill. ;  29 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>9061912563 
<br/><br/><label>LCCN: </label>83-147779 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal preparation--Congresses<br/>Coal--Congresses