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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
    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
    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
    RI 7077
    February 1968
    19 p.