http://www.helium.com/knowledge/248906-biography-the-third-caliph-of-islam-usman-bin-affaan.xml Helium.com > Islam > Biography: The third Caliph of Islam Usman bin Affaan en-us Copyright Helium.com Thu, 25 Jun 2009 10:59:16 GMT Thu, 25 Jun 2009 10:59:16 GMT