http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f6-subject=Natural history -- Mississippi River Valley) http://norton.wrhs.org/collections/search?docsPerPage%3D100;f6-subject%3DNatural%20history%20--%20Mississippi%20River%20Valley Results for your query: docsPerPage=100;f6-subject=Natural history -- Mississippi River Valley Thu, 01 Jan 1970 12:00:00 GMT Summary narrative of an exploratory expedition to the sources of the Mississippi River, in 1820: resumed and completed, by the discovery of its origin in Itasca Lake, in 1832. By authority of the United States. With appendices, comprising ... all of the official reports and scientific papers of both expeditions. Schoolcraft, Henry Rowe, 1793-1864 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