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  • Title: Geologic map of the eastern Willapa Hills, Cowlitz, Lewis, Pacific, and Wahkiakum Counties, Washington [superseded by Wells and Sawlan, 2014, U.S. Geological Survey, Open-File Report OF-2014-1063]
  • Author(s): Wells, R.E.
  • Publishing Organization: U.S. Geological Survey
  • Series and Number: Open-File Report OF-81-674
  • Publication Date: 1981
  • Map Scale: 1:62,500
  • Cross Section: Yes
  • North Latitude: 46° 38' 17" N (46.6380)
  • South Latitude: 46° 8' 35" N (46.1430)
  • East Longitude: 123° 0' 0" W (-123.0000)
  • West Longitude: 123° 30' 0" W (-123.5000)
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