Ajay Pratap Singh Mayank Yuvaraj <br/><br/>
Dewey Decimal Classification 23 :   A Practical Approach / 
Ajay Pratap Singh and Mayank Yuvaraj 
 - New Delhi :  Today and Tomorrow's printers and publishers,  c2014 
 - 410 p. 
<br/><br/><label>ISBN: </label>9788170194941 
<br/><br/><label>Dewey Class. No.: </label>025.431   / AJA/D