Tribes without rulers  Studies in African segmentary systems 
edited John Middleton and David Tait 
 - London :  Routledge & Paul  1967 
 - xi, 234 p. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>LCCN: </label>59-000418 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political anthropology