Petryanov I V <br/><br/>
Vishva ki sab se vilakshan dravya ( Most unusual substance in the world) 

 - Moscow   Mir Prakashan  1989 
 - 106p. 
<br/><br/><br/>MACESE 
<br/><br/><label>ISBN: </label>5-03-000306-1 
<br/><br/><label>Source: </label>Textual