Chakravarty, Subhash <br/><br/>
Caliphs and their non-muslim subjects  a critical study of the covenant of Umar 
A.S. Tritton. 
 - Delhi  Idarahi  [n.d.] 
 - 240p., 22cm 
 - (IAD religio philosophy reprint series no. 41) .
<br/><br/><label>Dewey Class. No.: </label>297.1977  / T80C