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WikiPedia: Sở thú San Diego http://www.californiaweekend.com/california-vacati... http://www.cnn.com/US/9806/05/albino.koala/ http://www.sandiegouniontribune.com/news/whats-now... http://usatoday30.usatoday.com/printedition/life/2... http://www.counterpunch.org/hribal12162008.html http://www.pbs.org/wnet/nature/episodes/animal-att... http://www.sandiegohistory.org/journal/78summer/zo... http://www.sandiegozoo.org http://www.sandiegozoo.org/conservation/news/san_d... http://www.sandiegozoo.org/disclaimers/aboutus.htm...