http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;expand=subject;f1-format=Article;f2-subject=Mammoth Cave (Ky.);smode=advanced) http://norton.wrhs.org/collections/search?docsPerPage%3D100;expand%3Dsubject;f1-format%3DArticle;f2-subject%3DMammoth%20Cave%20(Ky.);smode%3Dadvanced Results for your query: docsPerPage=100;expand=subject;f1-format=Article;f2-subject=Mammoth Cave (Ky.);smode=advanced Thu, 01 Jan 1970 12:00:00 GMT Extract of a letter from John H. Farnham ... describing the Mammoth cave in Kentucky. Farnham, John Hay, 1791-1833 http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT