Usha,P. <br/><br/>
Vishnubhakthi malayalakavithayil / 
Dr.P.Usha 
 - Edapal :  Vallathol vidyapeetham,  2012. 
<br/><br/><br/>In Malayalam. 
<br/><br/><label>ISBN: </label>9788192347660 
<br/><br/><label>Subjects--Index Terms: </label>Literary criticism Poetry criticism