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http://www.ubuntu-forum.de/index.php?page=ExternalLink&url=http%3A%2F%2Fdavidnitka.blog.idnes.cz%2Fredir.aspx%3Furl%3Dhttps%3A%2F%2Fpiratelib.ch%2Fko%2Farticle%2Ftop-history-books-published-i