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• Schutz, R. H.; Ferber, B. I.; Kloos, E. J.
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  Respiratory Protective Devices Approved by the Bureau of Mines as of October 1, 1965.
  Bureau of Mines, Pittsburgh, PA
  IC 8281, 1966, 25 p.

• Kloos, E. J.; Pearce, S. J.
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  Respiratory Protective Devices Approved by the Bureau of Mines as of October 16, 1958.
  Bureau of Mines, Pittsburgh, PA
  IC 7885, 1959, 27 p.

• Kloos, E. J.; Raymond, L. D.; Spinetti, L.
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  Performance of Open-Circuit Self-Contained Breathing Apparatus at -25 deg F.
  Bureau of Mines, Pittsburgh, PA
  RI 7077, February 1968, 19 p.