Ragep, F.J. <br/><br/>
Nasir al-Din al-Tusi's Memoir on Astronomy ( al - Tadhkira fi cilm al-hay'a ) ( Volume-I ) :  Introduction, Edition, and Translation 
/ by F.J. Ragep 
 - New York;  Springer-Verlag:  1993. 
 - xiii, 371p. 
<br/><br/><label>ISBN: </label>0387940510 
<br/><br/><label>Dewey Class. No.: </label>520  / RAG/N