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Geologic time scale bookmark

http://pubs.usgs.gov/gip/141/

This printable bookmark was designed for use with USGS activities at the 2nd USA Science and Engineering Festival, held April 26-29, 2012.

by U.S. Geological Survey (Sponsor)
U.S. Geological Survey General Information Product 141
This publication is available only as a PDF document.
Related topics:
Geologic time periods, Geologic time scales

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