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• Terrett, D.
  view article (1.0)

  Voice Alarm Loudspeakers.
  Avalon Emergency Systems, UK
  Fire Surveyor, Vol. 22, No. 5, 12-13, October 1993

• Terrett, D.
  view article (1.0)

  Voice Alarms.
  International Fire Protection (IFP) Magazine, No. 13, 35-38, February 2003