Ottens, J.
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Environmental protection costs in logging road design and construction to prevent increased sedimentation in the Carnation Creek watershed. 1977. Ottens, J.; Rudd, J.D. Environment Canada, Canadian Forestry Service, Pacific Forest Research Centre, Victoria, BC. Information Report BC-X-155. 28 p.
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Environmental costs in logging road design and construction. 1975. Ottens, J. Environment Canada, Forestry Service, Pacific Forest Research Centre, Victoria, BC. Information Report BC-X-108.
