Haykal, Muhammad Husayn,  1888-1956 <br/><br/>
al-Siddiq Abu Bakr Siddiq Abu Bakr / 
Muhammad Husayn Haykal. 
 - 6th ed. 
 - Misr :  Dar al-Ma'arif,  1971. 
 - 383 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Abu Bakr, Caliph, d.634