8. Apatosaurus. The Columbia Encyclopedia, Sixth Edition. 2001
   Apatosaurus. The Columbia Encyclopedia, Sixth Edition. 2001
   http: //bartleby.com/65/ap/Apatosau.html
   
   
9. DinoData Dinosaurs APATOSAURUS A149
   http: //ircs.upenn.edu/cogsci2000/apatosaurus.h...
   
   

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