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Ridgwayia pinicola Ridgway, Pennsylvania Ridgway, Quận Elk, Pennsylvania Ridgway, Quận Gallatin, Illinois Ridgeway Ridgeway, Iowa Ridgeway, Ohio Ridgeway, Wisconsin Ridgeway (thị trấn), WisconsinTài liệu tham khảo
WikiPedia: Ridgway, Pennsylvania http://factfinder2.census.gov/faces/tableservices/... http://www.census.gov/geo/www/gazetteer/gazetteer2...