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• Peters, R. H.; Wiehagen, W. J.
  view article (9.9981365)

  Human Factors Contributing to Groundfall Accidents in Underground Coal Mines: Workers' Views.
  Bureau of Mines, Pittsburgh, PA
  IC 9127, 1987, 27 p.

• Vaught, C.; Wiehagen, W. J.; Brnich, M. J., Jr.
  view article (9.992496)

  Self-Contained Self-Rescuer Donning Proficiency at Eight Eastern Underground Coal Mines.
  Bureau of Mines, Pittsburgh, PA
  RI 9383, 1991, 21 p.