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Northey, J. W.
view article (1.0)Telephones for Giving the Alarm?Fire Surveyor, Vol. 17, No. 3, 30-31, June 1988Northey, J. W.
view article (1.0)Smoke Detectors: Optical or Ionisation.Fire Surveyor, Vol. 9, No. 2, 20-23, April 1980