MAULVI ABDUL AZIZ <br/><br/>
History of Islam Umar ibn al- khattab 

 - RIYADH  DARUSALAM  2012 
 - 141 
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<br/><br/> Umar ibn al-Khattab[a] (Arabic: عُمَر بْن ٱلْخَطَّاب, romanized: Umar ibn al-Khaṭṭāb; c. 584 – 644), also spelled Omar, was the second Rashidun caliph, ruling from August 634, when he succeeded Abu Bakr (r. 632–634) as the second caliph, until his assassination in 644. 
<br/><br/><label>ISBN: </label>9786035000772 
<br/><br/><label>Dewey Class. No.: </label> / Abdul -U