http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f277-subject=Clay -- Ohio) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f277-subject%3DClay%20--%20Ohio Results for your query: docsPerPage=100;f277-subject=Clay -- Ohio Thu, 01 Jan 1970 12:00:00 GMT Potential use of beneficiated Ohio clay in the rubber industry. Carlton, Richard W. 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 Potential use of Ohio clays in the well-plugging industry. Carlton, Richard W. 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