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WikiPedia: Voi_răng_mấu http://www.mostateparks.com/mastodon.htm http://news.nationalgeographic.com/news/2006/10/06... http://www.slfp.com/Mastodon.htm http://www.usatoday.com/tech/science/discoveries/2... http://news.yahoo.com/s/ap/20070904/ap_on_sc/masto... http://news.yahoo.com/s/ap/20080808/ap_on_sc/sci_r... http://www.calvin.edu/academic/geology/mastodon/ca... http://www.cq.rm.cnr.it/elephants2001/atti_en.htm http://www.cq.rm.cnr.it/elephants2001/pdf/237_242.... http://www.amnh.org/exhibitions/expeditions/treasu...