Chhabra and Rikhi <br/><br/>
Abhinav grah vigyan  Hindi 

 - 3rd ed. 
 - New Delhi  Chaankaya Publications   1974 
 - 756 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Home Science
<br/><br/><label>Dewey Class. No.: </label>640 H74