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• Armstrong, F. E.
  view article (9.59908)

  Method and Apparatus for Measuring Incombustible Content of Coal Mine Dust Using Gamma-Ray Backscatter. Patent Application.
  PAT-APPL-550099; Serial 550,099, February 14, 1975, 22 p.

• Ray, R. M.; Carroll, B. B.; Armstrong, F. E.
  view article (9.59908)

  Evaluation of Small, Color-Changing Carbon Monoxide Dosimeters.
  Bureau of Mines, Bartlesville, OK
  RI 8051, June 1975, 26 p.