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| | Bibliography |
 | | Oppenheim, A. Leo, "Ancient Mesopotamia", Univ. of Chicago Press, IL, 1964. |
 | | Phillips, Wendell, "Qataban and Sheba", Harcourt, Brace and Co., NY, 1955, # |
 | | Gibbon, Edward, "Decline and Fall of the Roman Empire", 2 vols., Great Books, Britannica, 1776. |
| www.ancientroute.com /Credit/bibliography.htm (4118 words) |
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