Khanna, C.L. <br/><br/>
Delhi General Knowledge / 
Dr. C. L. Khanna 
 - 1st edition 
 -  Upkar ,  2023 
 - 107 
<br/><br/><label>ISBN: </label>9789350131411 
<br/><br/><label>Dewey Class. No.: </label>032.02  / KHA