संसार का सबसे अनोखा द्रव्य | Sansar ka sabse anokha dravya / 

 - Delhi  Bharat Gyan Vigyan Prakashan  1998 
 - 106p.  ill. 
<br/><br/> Feyanav krat 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic Geology 
<br/><br/><label>Dewey Class. No.: </label>553.7  / MEH-S