Ilekea, & Sam. (2001, January 1). Tundra Climate. Retrieved January 10, 2015, from
http://www.blueplanetbiomes.org/tundra_climate.htm
Tundra Threats, Tundra Species - National Geographic. (n.d.). Retrieved from http://environment.nationalgeographic.com/environment/habitats/tundra-threats/
Pullen, S. (2008, April 1). The Tundra Biome. Retrieved January 1, 2015, from http://www.ucmp.berkeley.edu/glossary/gloss5/biome/tundra.html
Tundra, Alaska Department of Fish and Game. (n.d.). Retrieved January 1, 2015,
from http://www.adfg.alaska.gov/index.cfm?adfg=tundra.main
http://www.blueplanetbiomes.org/tundra_climate.htm
Tundra Threats, Tundra Species - National Geographic. (n.d.). Retrieved from http://environment.nationalgeographic.com/environment/habitats/tundra-threats/
Pullen, S. (2008, April 1). The Tundra Biome. Retrieved January 1, 2015, from http://www.ucmp.berkeley.edu/glossary/gloss5/biome/tundra.html
Tundra, Alaska Department of Fish and Game. (n.d.). Retrieved January 1, 2015,
from http://www.adfg.alaska.gov/index.cfm?adfg=tundra.main