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  1. 1
    by Howell, A. R.
    Published 1974
    “...Canadian Forestry Service, Department of Environment,...”
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    Study of the exposure to noise of operators of mechanical logging equipment in British Columbia /
  2. 2
    by Reif, Z. F.
    Published 1973
    “...Canadian Forestry Service, Department of the Environment,...”
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    Study of the exposure to noise of operators of mechanized equipment in logging operations in Eastern Canada /

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