Ero sivun ”Trilobiitit” versioiden välillä
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Rivi 96:
*David Lambert and the Diagram Group. ''The Field Guide to Prehistoric Life.'' New York: Facts on File Publications, 1985. ISBN 0-8160-1125-7
* Riccardo Levi-Setti. ''Trilobites''. University of Chicago Press, 1993.
*[http://www.newscientist.com/channel/life/mg18625015.100/ Earliest combatants in sexual contests revealed]
*Fortey RA. 2001. Trilobite systematics: The last 75 years. Journal of Paleontology 75:1141–1151.
*[http://www.fossilmuseum.net/Tree_of_Life/PhylumArthropoda/ClassTrilobita.htm The Virtual Fossil Museum - Class Trilobita] -
*Kaesler RL, ed. 1997. Treatise on Invertebrate Paleontology, Part O, Volume 1, revised, Trilobita. Geological Society of America and University of Kansas Press, Lawrence, Kansas.
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