Hirnant (Swedish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hirnant" in Swedish language version.

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annualreviews.org

Brenchley, P.J.; J. D. (1994). ”Bathymetric and isotopic evidence for a short-lived Late Ordovician glaciation in a greenhouse period”. Geology 22: sid. 295–298. doi:10.1130/0091-7613(1994)022<0295:baiefa>2.3.co;2.
Sheehan, Peter M (1 May 2001). ”The Late Ordovician Mass Extinction”. Annual Review of Earth and Planetary Sciences 29 (1): sid. 331–364. doi:10.1146/annurev.earth.29.1.331. http://www.annualreviews.org/doi/abs/10.1146/annurev.earth.29.1.331?journalCode=earth&. Läst 25 november 2012.