A Concise Geologic Time Scale: 2016
by Dr. J. G. Ogg,Gabi Ogg,F. M. Gradstein
ISBN 13: 9780444637710
Format: Paperback (242 pages) Publisher: Elsevier Published: 01 Jun 2016
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Geologic Time Scale 2020
by F M Gradstein,James G. Ogg,Mark Schmitz,Gabi Ogg
ISBN 13: 9780128243602
Format: Paperback (1390 pages) Publisher: Elsevier Published: 26 Nov 2020