Materials for the History of the Text of the Quran The Old Codices : The Kitab Al-Masahif of Ibn Abi Dawud, Together With a Collection of the Variant Readings from the Codices of Ibn Masud, Ubai, Ali, Ibn Abbas, Anas, Abu Musa and Other Early Quranic Authorities Which Present a Type of Text Anterior to That of the Canonical Text of Uthman