Tritton, A. S.  1881-1973 <br/><br/>
The caliphs and their non-muslim subjects :  a critical study of the covenant of'Umar / 
by A. S. Tritton 
 - New ed. 
 - London :  Routledge,  2008 
 - 240 p. ;  24 cm. 
 - Routledge library editions : Islam ;  30 .
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9780415426008 (set)  RM18,684.00 9780415440950 (v.30)  RM389.25 0415426006 (set) 0415440955 (v.30) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Caliphate
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Islamic Empire--Politics and government