Wright, O. <br/><br/>
The modal system of Arab and Persian music, A.D. 1250-1300 / 
by O. Wright, 
 - Oxford :  Oxford University Press,  1978, 
 - 302 p. ;  ill. ;  25 cm. 
 - London oriental series ;  vol. 28 .
<br/><br/>Includes bibliographical references : p. 293-296. 
<br/><br/><label>ISBN: </label>0197135757 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Music, Arabic--History and criticism.<br/>Music, Iranian--History and criticism.<br/>Musical intervals and scales