Figure 4, 7, 9, 10, 11, 12--McGowen, Christopher, Dinosaurs, Spitfires, and Sea Dragons (Cambridge, Massachusetts: Harvard University Press, 1991)
Russell, Dale A., An Odyssey in Time: The Dinosaurs of North America (Toronto, Ontario: University of Toronto Press, 1989)
Sternberg, C.M., Hooded Hadrosaurs of the Belly Series of the Upper Cretaceous (Ottawa, Ontario: J.O Patenaude, I.S.O, 1935)
Figure 1--www.pacificcoast.net/~beg/sw/sw4.html
Figure 2--www.vishnu.glg.nau.edu/rcb/070_1st.jpg
Figure 3--www.gov.ab.ca/~env/nrs/dinosaur/mainmenu.html
Figure 5, 6, 8, 14--www.ucmp.berkeley.edu/diapsids/ornithischia/hadrosauria
Figure 13--www.tyrrell.magtech.ab.ca/tour/duckbill.html
www.tyrrellmuseum.com/ldp/corytho.htm
www.adventure.com/encyclopedia/dinosaurs/rtmedmon.html
www2.eos.net/stvivian/downunder/pictures/group1.html
www.wgn.net/~ghyatt/icons/backgrounds/natural/
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