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• Schutz, R. H.; Ferber, B. I.; Kloos, E. J.
  view article (9.9981365)

  Respiratory Protective Devices Approved by the Bureau of Mines as of October 1, 1965.
  Bureau of Mines, Pittsburgh, PA
  IC 8281, 1966, 25 p.

• Freedman, R. W.; Ferber, B. I.; Duerr, W. H.
  view article (9.992496)

  Gas-Sampling Capability of Vacutainers.
  Bureau of Mines, Pittsburgh, PA
  RI 8281, 1978, 8 p.