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  • "Bottlenose dolphins." Sea World. (3/10/2010) http://www.seaworld.org/animal-info/info-books/bottlenose/index.htm
  • Great Ape Trust Web site. (3/10/2010) http://www.greatapetrust.org/index.php
  • Hamilton, Jon. "A Voluble Visit with Two Talking Apes." NPR. July 8, 2006. (3/10/2010) http://www.npr.org/templates/story/story.php?storyId=5503685
  • Linden, Eugene. "Can Animals Think?" Time Magazine. March 22, 1993. (3/10/2010) http://www.des.emory.edu/mfp/303/CanAnimalsThink.pdf
  • "Our Research: Past and Present." The Dolphin Institute. (3/10/2010) http://www.dolphin-institute.org/our_research/
  • Raffaele, Paul. "Speaking Bonobo." Smithsonian Magazine. November 2006. (3/10/2010) http://www.smithsonianmag.com/science-nature/10022981.html
  • Smith, Dinita. "A Thinking Bird or Just Another Birdbrain?" New York Times. Oct. 9, 2010. (3/10/2010) http://www.nytimes.com/1999/10/09/arts/a-thinking-bird-or-just-another-birdbrain.html?pagewanted=1
  • The Alex Foundation. (3/10/2010) http://www.alexfoundation.org/index2.html
  • The Gorilla Foundation. (3/10/2010) http://www.koko.org/index.php
  • White, Thomas. "Between The Species."Loyola Marymount University. August 2009. (3/10/2010) http://www.cla.calpoly.edu/bts/issue_09/09white.pdf