Proceedings of the symposium on the nature of coal  
/ The Central Fuel Research Institute 
 - Jealgora;   The Central Fuel Research Institute,   1959 
 - 321p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal 
<br/><br/><label>Subjects--Index Terms: </label>Nature  
<br/><br/><label>Universal Decimal Class. No.: </label>622.33:539(082.2)  / K1