Silur: Perbedaan antara revisi
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{{Commonscat|Silurian}}
* [http://www.ucmp.berkeley.edu/silurian/silurian.html UCMP Berkeley:The Silurian]
* [http://tapestry.usgs.gov/ages/silurdevon.html USGS:Silurian and Devonian Rocks (U.S.)] {{Webarchive|url=https://web.archive.org/web/20060824004451/http://tapestry.usgs.gov/ages/silurdevon.html |date=2006-08-24 }}
* {{cite web | title=International Commission on Stratigraphy (ICS)| work=Geologic Time Scale 2004| url=http://www.stratigraphy.org/ | accessdaymonth=19 September| accessyear=2005}}
* [http://www.geo-lieven.com/erdzeitalter/silur/silur.htm Examples of Silurian Fossils]
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