| The Columbia Gazetteer of North America. 2000. |
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| Elma |
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| Elma, town (1990 pop. 653), Howard co., NE Iowa, 18 mi/29 km SW of Cresco; 43°15'N 92°26'W. Concrete blocks. Limestone quarry and gravel pits nearby. |
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| | | The Columbia Gazetteer of North America. Copyright © 2000 Columbia University Press. |
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