Das D K Lal <br/><br/>
Samajik shodh: Siddhant evam vyavhar 

 - Jaipur, India  Rawat Publications  2017 
 - xxii, 352p. 
<br/><br/><label>ISBN: </label>978-81-316-0858-6 
<br/><br/><label>Source: </label>TextBook