| Jaussen et Savignac en Arabie "Hedjaz" 1910 , Vol | Strenziak, Die Genealogle der Nordaraber nach Ibn Al-Kalbi, Koln-1953 , Vol |
|---|---|
| Hardings, Some Thamudic Inscriptions Leiden-1952• | Jawwad Ali, The Detailed History of Arabs before Islam 1993 , University of Baghdad, Vol |