منطقة قطبية: الفرق بين النسختين

* [http://maps.grida.no/arctic/ Arctic Environmental Atlas (UNDP)]

* [http://www.windows.ucar.edu/polar.html Earth's Polar Regions on Windows to the Universe]

* [http://www.spri.cam.ac.uk/ Scott Polar Research Institute, University of Cambridge]

* [http://www.panda.org/news_facts/education/middle_school/habitats/polar_regions/index.cfm WWF:The Polar Regions]