http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;smode=advanced;subject=Ohio River Valley -- Commerce;subject-join=exact) http://norton.wrhs.org/collections/search?docsPerPage%3D100;smode%3Dadvanced;subject%3DOhio%20River%20Valley%20--%20Commerce;subject-join%3Dexact Results for your query: docsPerPage=100;smode=advanced;subject=Ohio River Valley -- Commerce;subject-join=exact Thu, 01 Jan 1970 12:00:00 GMT On the railway connections of Philadelphia with the central West: Letters of Prof. Edward D. Mansfield to Job R. Tyson. Mansfield, Edward Deering, 1801-1880 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 Prospectus of the Ohio Valley Industrial Exposition: to be held in the city of Cincinnati, August 29 to September 24, inclusive 1910, representative of the resources and industries of the Ohio Valley and the southland. Ohio Valley Industrial Exposition (1910 : Cincinnati, Ohio) 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 The products of the Ohio Valley, especially coal, considered in reference to the Nicaraugua [sic] Canal: statement of Governor MacCorkle of West Virginia, before the Committee on Interstate and Foreign Commerce, House of Representatives, Washington, May 9, 1896. United States Congress. House. Committee on Interstate and Foreign Commerce., MacCorkle, William Alexander, 1857-1930 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 A history of transportation in the Ohio valley: with special reference to its waterways, trade, and commerce from the earliest period to the present time. Ambler, Charles Henry, 1876-1957 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