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  • Britt, Robert Roy. "Weather 101: All About Wind and Rain." Live Science. (4/23/2008) http://www.livescience.com/environment/weather_science.html
  • Davenport, Steve. "Noctilucent Clouds." MeteoGroup. 9/5/2007. (4/23/3008) http://www.meteogroup.co.uk/uk/home/weather/weather_news/ news_archive/archive/2007/may/ch/794bb3c5fa/article/ noctilucent_clouds.html
  • Fraser, Alistair. "Bad Clouds FAQs." Pennsylvania State University. (4/22/2008) http://www.ems.psu.edu/%7Efraser/Bad/BadFAQ/BadCloudsFAQ.html
  • Fraser, Alistair. "Bad Meteorology: The reason clouds form when air cools is because cold air cannot hold as much water vapor as warm air." Pennsylvania State University. (4/22/2008) http://www.ems.psu.edu/%7Efraser/Bad/BadClouds.html
  • Harris, Richard. "Gas Cloud Headed for Milky Way Collision." NPR. 1/11/2008. (4/22/2008) http://www.npr.org/templates/story/story.php?storyId=18027001
  • Joyce, Christopher. "Snow Flurries, Bacteria Likely." NPR. 3/3/2008. (4/22/2008) http://www.npr.org/templates/story/story.php?storyId=87761584
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  • O'Carroll, Cynthia. "NASA Satellite Captures First View of Night-Shining Clouds." NASA Goddard Space Flight Center. 6/28/2007. (4/24/2008) http://www.nasa.gov/mission_pages/aim/multimedia/first_view.html
  • Palmer, Chad. "Understanding Clouds and Fog." USA Today Weather team. (4/22/2008) http://www.usatoday.com/weather/wcloud0.htm
  • Phillips, Tony. "All the World's a Stage for Dust." NASA Science and Technology Directorate. 6/26/2001. (4/22/2008) http://science.nasa.gov/headlines/y2001/ast26jun_1.htm
  • Phillips, Tony. "Dust Begets Dust." NASA Science and Technology Directorate. 5/22/2001. (4/22/2008) http://science.nasa.gov/headlines/y2001/ast22may_1.htm
  • Phillips, Tony. "Night Clouds." NASA Science and Technology Directorate. 6/20/2003. (4/22/2008) http://science.nasa.gov/headlines/y2003/20jun_TMAclouds.htm
  • Phillips, Tony. "Strange Clouds." NASA Science and Technology Directorate. 2/19/2003. (4/22/2008) http://science.nasa.gov/headlines/y2003/19feb_nlc.htm
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  • Schroder, Wilfried. "Were Noctilucent Clouds Caused by the Krakatoa Eruption? A Case Study of Reaserch Problems before 1885." Bulletin of the American Meteorological Society. 4/20/2008. (4/24/2008) http://ams.allenpress.com/archive/1520-0477/80/10/pdf/ i1520-0477-80-10-2081.pdf
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