Cooperson, Michael <br/><br/>
Al-Maʻmun 

 - Oxford:  Oneworld,  2005 
 - xii, 144 p. : ill. ; 23 cm 
<br/><br/><label>ISBN: </label>9781851683864 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Caliphs - Biography
<br/><br/><label>Dewey Class. No.: </label>909.097670092 COO