Tinh_tinh
Tinh_tinh
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WikiPedia: Tinh_tinh http://news.nationalgeographic.com/news/2002/09/09... http://www.newscientist.com/article.ns?id=dn3744 http://artsbeat.blogs.nytimes.com/2011/12/28/cheet... http://www.fas.harvard.edu/~primates http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=... http://web.archive.org/19991002235107/www.geocitie... http://www.awf.org/wildlives/6 http://www.janegoodall.org/chimp_central/default.a... http://www.savethechimps.org/chimps_pets.asp http://chimp.st-and.ac.uk/cultures/intro.htm