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 Name                           Last modified      Size  
 Parent Directory                                    -   
 report-thumb.JPG               2013-07-31 09:57   31K  
 report.pdf                     2013-07-12 15:51   10M

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U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/1976/0160/
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