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WikiPedia: Đua_chó http://www.agtoa.com/default.asp?track=7 http://www.boston.com/news/politics/2008/massachus... http://mvguam.com/index.php?option=com_content&vie... http://www.rockymountainnews.com/news/2008/jun/23/... http://library.eb.co.uk/eb/article-9030788 http://www.gencourt.state.nh.us/legislation/2010/H... http://duongbo.vn/0501-8442/No-ro-mon-the-thao-dua... http://www.tienphong.vn/xa-hoi/36016/Doi-cho-dua.h... http://vtc.vn/200-443171/the-thao/vao-truong-huan-... http://news.zing.vn/Vui-buon-doi-cho-dua-post35350...