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  1. 1
    Published 1974
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    Forest harvesting mechanization and automation : proceedings IUFRO Division 3, Ottawa, Thunder Bay, Sault Ste. Marie, Canada, September 25-October 5, 1974 /
  2. 2
    by Howell, A. R.
    Published 1974
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    Study of the exposure to noise of operators of mechanical logging equipment in British Columbia /

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