http://www.cotf.edu/ete/modules/msese/earthsysflr/tundra.html

http://www.enchantedlearning.com/biomes/tundra/tundra.shtml

http://mbgnet.mobot.org/sets/

http://www.blueplanetbiomes.org/tundra.htm

http://www.blueplanetbiomes.org/alpine.htm

http://earthobservatory.nasa.gov/Laboratory/Biome/biotundra.html

http://members.aol.com/bowermanb/ecosystems.html

http://www.worldbiomes.com/biomes_tundra.htm

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/B/Biomes.html

http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/tundra/tundra.html

http://www.ucmp.berkeley.edu/glossary/gloss5/biome/tundra.html

http://www.yale.edu/ynhti/curriculum/units/1992/5/92.05.12.x.html

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