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http://norton.wrhs.org/collections/search?docsPerPage%3D100;f220-subject%3DPlows
Results for your query: docsPerPage=100;f220-subject=PlowsThu, 01 Jan 1970 12:00:00 GMTJohn Deere's steel plow. Kendall, Edward C., Museum of History and Technology (U.S.)
http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc
http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrcThu, 01 Jan 1970 12:00:00 GMTJethro Wood, inventor of the modern plow: A brief account of his life, services and trials, together with facts subsequent to his death, and incident to his great invention. Gilbert, Frank, 1839-1899
http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc
http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrcThu, 01 Jan 1970 12:00:00 GMT