Sharma,Ram Kishore,Shrivastav;Bhagwati Prasad <br/><br/>
Bhotik vigyan  Hindi 

 - 8th ed. 
 - Meerut   Bharat Bharti prakashan  1968 
 - 560pg 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>530 S23B