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  • "Electronics: X Rays in the Living Room." Time. Aug. 4, 1967. (July 28, 2009) http://www.time.com/time/magazine/article/0,9171,837185,00.html
  • Ellis, Ed. "Dry Eyes." EyeCareSource.com. 2009. (July 28, 2009) http://www.eyecaresource.com/conditions/dry-eyes/
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