http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f8-subject=Mineral industries -- Ohio -- Directories) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f8-subject%3DMineral%20industries%20--%20Ohio%20--%20Directories Results for your query: docsPerPage=100;f8-subject=Mineral industries -- Ohio -- Directories Thu, 01 Jan 1970 12:00:00 GMT Report on Ohio mineral industries: with directories of reporting coal and industrial mineral operators. Ohio Division of Geological Survey. 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 Report with coal and industrial mineral directories of reporting firms. Ohio Division of Mines. 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