Smith, Sidney (1954). "Events in Arabia in the 6th Century A. D.". Bulletin of the School of Oriental and African Studies, University of London. 16 (3): 425–468. doi:10.1017/S0041977X00086791. JSTOR608617. S2CID163004552.
Smith, Sidney (1954). "Events in Arabia in the 6th Century A. D.". Bulletin of the School of Oriental and African Studies, University of London. 16 (3): 425–468. doi:10.1017/S0041977X00086791. JSTOR608617. S2CID163004552.
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Smith, Sidney (1954). "Events in Arabia in the 6th Century A. D.". Bulletin of the School of Oriental and African Studies, University of London. 16 (3): 425–468. doi:10.1017/S0041977X00086791. JSTOR608617. S2CID163004552.