Clarkson, E. N. K. 1998. Invertebrate Palaeontology and Evolution. 4th edition. Oxford: Blackwell Science Ltd.
Moore, R. C. 1959. Treatise on Invertebrate Palaeontology, Part O, Arthropoda 1. Uni. of Kansas Press and the Geol. Soc. of America.
www.trilobites.info/ordphacopida.htm
Author: Sarah Vinnell
Last updated: 21/11/05
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