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Portland, Oregon Portland (lớp tàu tuần dương) Portland, Victoria Portland Portland, Maine Portland International Jetport Portland Pattern Repository Portland, Tennessee Portland, Quận Dodge, Wisconsin Portlandia grandifloraTài liệu tham khảo
WikiPedia: Portland, Arkansas http://factfinder2.census.gov/faces/tableservices/... http://www.census.gov/geo/www/gazetteer/gazetteer2...