http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f7-subject=Iron ores -- Pennsylvania) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f7-subject%3DIron%20ores%20--%20Pennsylvania Results for your query: docsPerPage=100;f7-subject=Iron ores -- Pennsylvania Thu, 01 Jan 1970 12:00:00 GMT Report of progress on the brown hematite ore ranges of Lehigh County: with a description of the mines lying between Emaus, Alburtis and Fogelsville. Prime, Frederick, 1846-1915 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 Analysis of some of the anthracites and iron ores found on the head waters of Beaver Creek: in the counties of Luzerne, Northampton and Schuylkill, Pa. Johnson, Walter R. (Walter Rogers), 1794-1852 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