The Concise Geologic Time Scale
by James G. Ogg,Gabi Ogg,Felix M. Gradstein
ISBN 13: 9780521898492
Format: Hardcover (184 pages) Publisher: Cambridge University Press Published: 04 Sep 2008
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A Geologic Time Scale 2004
by
ISBN 13: 9780521786737
Format: Paperback (610 pages) Publisher: Cambridge University Press Published: 17 Mar 2005