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 Name                           Last modified      Size  
 Parent Directory                                    -   
 plate-1-thumb.jpg              2011-05-02 11:26   15K  
 plate-1.pdf                    2011-03-31 15:11  4.4M  
 report-thumb.jpg               2011-05-03 13:09  3.0K  
 report.pdf                     2010-11-30 04:11  2.5M

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U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/1981/1021/
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