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WikiPedia: Lịch_sử_Triều_Tiên http://www.infobase.gov.cn/intro/fzlt/36.htm http://www.bartleby.com/67/160.html http://www.bookrags.com/history/worldhistory/yayoi... http://www.boston.com/news/nation/washington/artic... http://www.britannica.com/eb/article-9050797?query... http://archives.cnn.com/2001/WORLD/asiapcf/east/03... http://www.dbpia.com/view/ar_view.asp?arid=584717 http://findarticles.com/p/articles/mi_qa3693/is_20... http://books.google.com/books?vid=ISBN1588113795&i... http://www.japan-guide.com/e/e2046.html