McGill-Warner Company, St. Paul, MinnesotaDuluth; Superior Wisconsin; Twin Ports; Duluth street and avenue index; Superior street and avenue index; populationJPEGengMcGill-Warner Company, St. Paul, MinnesotaPublicTransportationMap of Duluth: Duluth-Superior Minnesota "Twin Ports" WisconsinMapsMinnesota--DuluthMinnesota--Saint Louis CountyMinnesota1935University of Minnesota