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London
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Iraq
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Greek
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Baghdad
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geographic coordinate system
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Mesopotamia
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Euphrates
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Ptolemy
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Tigris
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Pliny the Elder
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public domain
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Ammianus Marcellinus
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Arrian
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Seleucia
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Stephanus of Byzantium
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Mandaic
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Jean Baptiste Bourguignon d'Anville
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Encyclopædia Britannica 11th edition
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The Jewish Encyclopedia
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William Smith
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