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• Parker, W. J.; Paabo, M.; Scott, J. T.; Gross, D.; Benjamin, I. A.
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  Fire Endurance of Gypsum Board Walls and Chases Containing Plastic and Metallic Drain, Waste and Vent Plumbing Systems.
  National Bureau of Standards, Gaithersburg, MD
  NBS BSS 072
  Department of Housing and Urban Development, Washington, DC, NBS BSS 072
  September 1975
  114 p.