http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f46-subject=Gas manufacture and works -- United States -- Patents) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f46-subject%3DGas%20manufacture%20and%20works%20--%20United%20States%20--%20Patents Results for your query: docsPerPage=100;f46-subject=Gas manufacture and works -- United States -- Patents Thu, 01 Jan 1970 12:00:00 GMT Proceedings of the American Gas Institute. American Gas Institute 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