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 Name                           Last modified      Size  
 Parent Directory                                    -   
 plate-1-thumb.jpg              2011-05-03 18:36  8.1K  
 plate-1.pdf                    2011-04-08 14:27  5.4M  
 plate-2-thumb.jpg              2011-05-03 18:36  4.2K  
 plate-2.pdf                    2011-04-08 14:27  2.5M

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U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/1981/0431/
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