विज्ञान यात्रा 
 Vigyaan yatra 

 - New Delhi:   Vigyaan Prasaar,   1994 
 - 246p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Literature 
<br/><br/><label>Universal Decimal Class. No.: </label>06.055.6  / N8