| 21. | Daegu is the principal city of the surrounding North Gyeongsang Province.
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| 22. | It is the principal city of the Adjuntas Micropolitan Statistical Area.
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| 23. | The principal cities in the district are Amarillo and Wichita Falls.
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| 24. | It is the principal city of the Jayuya Micropolitan Statistical Area.
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| 25. | It is a principal city of the Fort Walton Beach " Metropolitan Statistical Area.
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| 26. | Douglas is the principal city of the Douglas Micropolitan Statistical Area, a 2010 census.
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| 27. | Vukovar was the principal city returned to Croatian control in a ceremony last Thursday.
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| 28. | Some of the principal cities in the district include Altus.
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| 29. | It is a principal city of the Auburn-Opelika Metropolitan Area.
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| 30. | Idaho Falls is the principal city of the Idaho Falls, Idaho Spokane metropolitan area.
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