http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f135-subject=Iron industry and trade -- Middle West) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f135-subject%3DIron%20industry%20and%20trade%20--%20Middle%20West Results for your query: docsPerPage=100;f135-subject=Iron industry and trade -- Middle West Thu, 01 Jan 1970 12:00:00 GMT Summary, ... mine shipments of Lake Superior iron ore by railroads to upper lake ports and all rail. Lake Superior Iron Ore Association https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT