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• Rasmussen, P. G.; Chesterfield, B. P.; Lowrey, D. L.
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  Readability of Self-Illuminated Signs Obscured by Black Fuel-Fire Smoke.
  FAA Civil Aeromedical Inst., Oklahoma City, OK
  FAA-AM-80-13
  Federal Aviation Administration, Washington, DC, FAA-AM-80-13
  July 1980
  12 p.