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WikiPedia: Vương Văn Bắc http://hoiquanphidung.com/content.php?785-Tang-l%E... http://www.nguoi-viet.com/absolutenm2/templates/?a... http://www.lib.umb.edu/archives/digital/index.php?... http://www.rfa.org/vietnamese/in_depth/memories-of... http://www.rulers.org/fm4.html http://www.spratlys.org/collection/claims/vietnam/... http://www.tqlcvn.org/linh_tinh/hoangsa_nhuommau.h... http://www.bbc.co.uk/vietnamese/vietnam/2011/07/11... https://web.archive.org/web/20160305122200/http://...