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WikiPedia: Cực_Nam_từ http://www.aad.gov.au/default.asp?casid=1843 http://gsc.nrcan.gc.ca/geomag/nmp/northpole_e.php http://deeptow.whoi.edu/southpole.html http://www.ngdc.noaa.gov/seg/geomag/faqgeom.shtml //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v...