Revision history of "File:Geological time spiral.png"

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  • curprev 19:15, 30 June 2014‎ Molyneux talk contribs‎ 202 bytes +202‎ United States Geological Survey - Graham, Joseph, Newman, William, and Stacy, John, 2008, The geologic time spiral—A path to the past (ver. 1.1): U.S. Geological Survey General Information Product 58.
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