Dubey, Vidyasagar <br/><br/>
Bhu-vigyan: ek parichay (भू-विज्ञान : एक परिचय) 

 - Bhopal   Madhya Pradesh Hindi granth academy  1989 
 - 637 p.  
<br/><br/><label>Dewey Class. No.: </label>551   / VIDYA BHU