Young, William G., <br/><br/>
Patriarch, shah, and caliph :  a study of the relationships of the Church of the East with the Sassanid Empire and the early caliphates up to 820 A.D., with special reference to available translated Syriac sources / 
by William G. Young. 
 - Rawalpindi :  Christian Study Centre,  1974. 
 - xiii, 222 p. :  maps ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. [viii]-xiii. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Church and state--History.--Middle East
<br/><br/><label>LC Class. No.: </label>BR1070.Y68 1974