Narayanan, M. G. S., <br/><br/>
Perumāḷs of Kerala :  Brahmin oligarchy and ritual monarchy : political and social conditions of Kerala under the Cēra Perumāḷs of Makōtai (c. AD 800-AD 1124) / 
by.M.G.S. Narayanan. 
 - 512 pages :  map ; 
<br/><br/> Reprint. Originally published: Calicut : Xavier Press, 1996.  Originally presented as the author's thesis (Ph. D.)--University of Kerala, 1972. 
<br/><br/>Includes bibliographical references (pages 424-433) and index. 
<br/><br/><label>ISBN: </label>8188765074 9788188765072 
<br/><br/><label>Dewey Class. No.: </label>954.83 NAR.P