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The Geologic Time Scale 2012

Felix M. Gradstein, James G. Ogg, Mark D. Schmitz, and Gabi M. Ogg

Elsevier , 2012

vol1      volume 2

 

The Concise Geologic Time Scale (CGTS)

James G. Ogg, Gabi Ogg and Felix M. Gradstein

Cambridge University Press, 2008

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