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• The Colony Plant (Near Grand Valley in the Piceance Basin) after Years of Research, Has Taken Oil Shale from an Underground Mine and Has Successfully Processed It in an Experimental Retort Ten Per Cent of Colony's Twenty-Four Million Dollars Research Prog

  • Uploaded by: U.S. National Archives
  • License: No known copyright restrictions
  • 0 comments
  • 1 favorite
  • 5,080 views
  • Date taken: 1972
  • Date uploaded: 2009-08-12
  • Tags: usnationalarchives, environmentalprotectionagency, documerica, nara:arcid=552688
  • Visibility: public