ISBN 9780887060571 books & textbook
The History of al-abarī Vol. 32: The Reunification of the Abbāsid Caliphate: The Caliphate of al-Mamūn A.D. 813-833/A.H. 198-218 (Near Eastern Studies (Dis))
State University of New York Press /1987-03-01 Paperback / 300 Pages
isbn-10: 0887060579 / isbn-13: 9780887060571
