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 Name                           Last modified      Size  
 Parent Directory                                    -   
 plate-2.pdf                    2011-04-08 14:30  3.4M  
 plate-2-thumb.jpg              2011-05-03 18:37  6.5K  
 plate-1.pdf                    2011-04-08 14:29  3.8M  
 plate-1-thumb.jpg              2011-05-03 18:37  6.7K

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U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/1981/0549/
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