Gopalakrishnan, P. K. <br/><br/>
Sree Narayana Guru:  viswa manavikathayude pravachakan / 
by P. K. Gopalakrishnan 
 - 2nd ed. 
 - Thiruvananthapuram :  Prabhath,  1992. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>Subjects--Index Terms: </label>Mysticism Sree Narayana Guru