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WikiPedia: Phân chia Nam Bắc ở Anh http://bmj.bmjjournals.com/cgi/content/abstract/32... http://bmj.bmjjournals.com/cgi/content/full/329/74... http://www.camecon.com/whatsnew/releases/pdffiles/... http://www.campaignforhsr.com/press-release-nearly... http://www.economist.com/node/21562938 http://web.archive.org/web/20060725160233/http://w... http://news.bbc.co.uk/1/shared/spl/hi/in_depth/uk_... http://www.dailymail.co.uk/news/article-487058/The... http://observer.guardian.co.uk/education/story/0,1... http://www.guardian.co.uk/britain/article/0,,15220...