Srednji ordovicij – razlika između verzija
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Red 8:
== Vanjski linkovi ==
* [http://zircon.geology.union.edu/Gildner/globe.html The World during the Middle and Late Ordovician] {{Webarchive|url=https://web.archive.org/web/20050321004858/http://zircon.geology.union.edu/Gildner/globe.html |date=2005-03-21 }} paleogeography
* [http://www.palaeos.com/Paleozoic/Ordovician/MidOrd.html The Middle Ordovician ] {{Webarchive|url=https://web.archive.org/web/20060313161553/http://www.palaeos.com/Paleozoic/Ordovician/MidOrd.html |date=2006-03-13 }}
* [http://www.stratigraphy.org/geowhen/stages/Middle_Ordovician.html GeoWhen Database - Middle Ordovician]
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