Physical cleaning of coal  present and developing methods 
edited by Y.A. Liu. 
 - New York  M. Dekker  1982. 
 - xvii, 551 pages:    illustration,    23 cm 
 - Energy, power, and environment  15 .
<br/><br/>Includes bibliographies and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Cleaning