http://www.ucmp.berkeley.edu/glossary/gloss5/biome/deserts.html
http://www.desertusa.com/life.html
http://environment.nationalgeographic.com/environment/habitats/desert-profile/
http://www.blueplanetbiomes.org/desert_climate_page.htm
http://study.com/academy/lesson/desert-biomes-facts-climate-locations.html
http://www.softschools.com/facts/biomes/desert_biome_facts/167/
http://discovermagazine.com/2012/jul-aug/20-things-you-didnt-know-about-deserts
http://www.defenders.org/desert/basic-facts
http://www.bioexpedition.com/desert-biome/
http://www.mbgnet.net/sets/desert/cold.htm
https://wildtracks.wordpress.com/world-ecosystems/desert-ecosystems/cold-desert-ecosystem/
http://www.worldbiomes.com/biomes_desert.htm