Phân bố Voọc xám Đông Dương

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WikiPedia: Voọc xám Đông Dương http://www.hanoizoo.com/vuonthuhanoi/2009/vn/modul... http://www.bucknell.edu/msw3/browse.asp?id=1210073... http://www.vncreatures.net/chitiet.php?page=1&loai... http://www.iucnredlist.org/details/22040 http://thiennhien.org/tin-ve-thien-nhien-va-bao-to... http://www.24h.com.vn/tin-tuc-trong-ngay/diem-danh... http://dantri.com.vn/xa-hoi/phat-hien-loai-vooc-xa... http://www.klth.org.vn/default.aspx?NewsID=342 http://www.sggp.org.vn/thongtincanuoc/2009/3/18421... http://news.zing.vn/phat-hien-dan-vooc-xam-dong-du...