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WikiPedia: Sông_băng http://www.ga.gov.au/education/facts/landforms/aus... http://www.hls-dhs-dss.ch/textes/f/F007772.php http://www.grid.unep.ch/activities/global_change/s... http://amsglossary.allenpress.com/glossary/search?... http://www.beringia.com/centre_info/exhibit.html http://www.britannica.com/EBchecked/topic/234619 http://geology.com/press-release/hawiian-glaciers/ http://www.marstoday.com/news/viewpr.html?pid=1805... http://link.springer.com/referenceworkentry/10.100... http://news.brown.edu/pressreleases/2008/04/martia...