Alex. "10 Neat Facts About Carl Sagan." Neatorama.
Web. 24 Nov.
2010.
<http://www.neatorama.com/2009/11/09/10-
neat-facts-
about-carl-sagan/>.
"Carl Sagan." Wikipedia, the Free Encyclopedia. Web. 24 Nov.
2010.
<http://en.wikipedia.org/wiki/Carl_Sagan>.
Morrison, David. "AmeriQuests - Vol. 3, No. 2 (2006)." Jean and
Alexander Heard Library E-Journals.
Web. 24 Nov. 2010.
<http://ejournals.library.vanderbilt.edu/ameriquests
/viewarticle.php?id=93&
layout=html>.
"SETI Institute
- Center for SETI Research." SETI Institute. Web. 24 Nov. 2010.
<http://www.seti.org /seti>.
Carl Sagan "Science"
New Series, Vol. 220, No. 4596 (Apr. 29, 1983), p. 462
Published by:
American Association for the Advancement of Science
Stable URL:
http://www.jstor.org/stable/1690458
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