http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f4-subject=Iron ores -- Grading) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f4-subject%3DIron%20ores%20--%20Grading Results for your query: docsPerPage=100;f4-subject=Iron ores -- Grading Thu, 01 Jan 1970 12:00:00 GMT Grade statement. Grades of Lake Superior iron ore shipped by lake, season ... in gross tons, vessel bill-of-lading weights. 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