http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f358-subject=Mississippi River -- Navigation -- Congresses) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f358-subject%3DMississippi%20River%20--%20Navigation%20--%20Congresses Results for your query: docsPerPage=100;f358-subject=Mississippi River -- Navigation -- Congresses Thu, 01 Jan 1970 12:00:00 GMT Proceedings of the Mississippi River Improvement Convention, held at Dubuque, Iowa, February 14th and 15th, 1866. Mississippi River Improvement Convention (1866 : Dubuque, Iowa). 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 Proceedings. River Improvement Convention (1867 : Saint Louis, Mo.)., Union Merchants' Exchange of St. Louis (Saint Louis, Mo.) 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