Chandra, D <br/><br/>
Textbook of coal 

 - Varanasi  Tara Book Agency  2000 
<br/><br/><label>Subjects--Index Terms: </label>Exploration of coal  Minning of coal  Coal and enviornment 
<br/><br/><label>Dewey Class. No.: </label>553.2  / P0;2