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5,173 Posts
What appears to be a good historical refererence, and free!
http://books.google.com/books?id=Tj...resnum=1&ved=0CAgQ6AEwAA#v=onepage&q=&f=false
http://books.google.com/books?id=Tj...resnum=1&ved=0CAgQ6AEwAA#v=onepage&q=&f=false