Swami Satyananda Saraswathi <br/><br/>
Four chapters on freedom : commentary on Yoga sutras of Patanjali 

 - 2nd ed 
 - Bihar  Yoga Publications Trust  2013 
 - 395 p.  pbk. 
<br/><br/><label>ISBN: </label>9788185787183 
<br/><br/><label>Dewey Class. No.: </label>181.452