Tritton,A.S. <br/><br/>
The Caliphs and their non-muslim subjects  a critical study of the convenant of Umar 

 - London  Oxford university press  1930 
 - 238 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English Literature
<br/><br/><label>Dewey Class. No.: </label>Ha106