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http://books.google.com/books?id=E4VLDC–wMoC&lpg=PA407&dq=marsden%20ware&pg=PA32#v=onepage&q=marsden%20ware&f=false
http://books.google.com/books?id=E4VLDC–wMoC&lpg=PA407&dq=marsden%20ware&pg=PA51#v=onepage&q=marsden%20ware&f=false
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