http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f8-subject=Coal -- United States) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f8-subject%3DCoal%20--%20United%20States Results for your query: docsPerPage=100;f8-subject=Coal -- United States Thu, 01 Jan 1970 12:00:00 GMT The story of American coals. Nicolls, William Jasper, 1854-1916 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 The coal-regions of America: their topography, geology, and development. Macfarlane, James, 1819-1885 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