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)  

 - Thrissur , Kerala  CosmoBooks  2018 
 - 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/><label>ISBN: </label>8188765074 9788188765072 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chera dynasty, -- 3 B.C.-12 A.D<br/>India -- History -- 324 B.C.-1000 A.D.<br/>Kerala (India) -- History.
<br/><br/><label>Dewey Class. No.: </label>954.83  / NAR