Sources:

-Dr. Ken Hooper Virtual Natural History Museum – www.hoopermuseum.earthsci.carleton.ca
-National Geographic – www.animals.nationalgeographic.com
-National Geographic Video – www.video.nationalgeographic.com
-The Tree of Life - www.tolweb.org
-University of Bristol – www.palaeo.gly.bris.ac.uk
-University of California Museum of Paleontology – www.ucmp.berkeley.edu
-UK Fossils Network - www.ukfossils.co.uk
-Wikipedia – www.en.wikipedia.org
-Youtube.com

Citation: García, A.I. 2015. The Tree Of Nature (Online) at http://thetreeofnature.com

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