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References:
Benton, M. J. (2005). Vertebrate Palaeontology (3rd edition), Blackwell Science Ltd.: Oxford
Carroll, R. (1988). Vertebrate Paleontology and Evolution,
W. H. Freeman and Company: New York.
Links:
Palaeos: http://www.palaeos.com
Those Diverse Reptiles: http://www.ucmp.berkeley.edu/diapsids/diapsids.html
Tree of Life: http://tolweb.org/
All photos, where not sourced, are courtesy of Classroomclipart.com and All Dinosaurs! http://members.lycos.nl/dinosaurs/