| | <http://www.consumerenergycenter.org/home/heating_cooling/geothermal |
| | .html>. |
| | "Heat Transfer: Conduction, Convection, Radiation." Welcome to Wisc- |
| | Online.com. Web. 31 Jan. 2010. <http://www.wisc- |
| | online.com/objects/ViewObject.aspx?ID=SCE304>. |
| | "Heat Transfer." Test Page for Apache Installation. Web. 31 Jan. 2010. |
| | <http://hyperphysics.phy-astr.gsu.edu/HBASE/thermo/heatra.html>. |
| | "How Geothermal Energy Works | Union of Concerned Scientists." |
| | Homepage | Union of Concerned Scientists. Web. 29 Nov. 2009. |
| | <http://www.ucsusa.org/clean_energy/technology_and_impacts/energy_t |
| | echnologies/how-geothermal-energy-works.html>. |
| | "How Geothermal Energy Works | Union of Concerned Scientists." |
| | Homepage | Union of Concerned Scientists. Web. 29 Nov. 2009. |
| | <http://www.ucsusa.org/clean_energy/technology_and_impacts/energy_t |
| | echnologies/how-geothermal-energy-works.html>. |
| | "Sediment and Sedimentation: Information from Answers.com." |
| | Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, |
| | and encyclopedias. Web. 03 Jan. 2010. |
| | <http://www.answers.com/topic/sediment-and-sedimentation>. |
| | "Soil - EnchantedLearning.com." ENCHANTED LEARNING HOME PAGE. |
| | Web. 03 Jan. 2010. <http://www.enchantedlearning.com/geology/soil/>. |
| | "Tapping the Earth for home heating and cooling | Green Tech - CNET |
| | News." Technology News - CNET News. Web. 29 Nov. 2009. |
| | <http://news.cnet.com/8301-11128_3-10131539-54.html>. |