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2. Early growth of planted spruce;Burdett;Can. J. For. Res.,1984
3. Coates, D., Haeussler, S., 1987. A Guide to the Use of Mechanical Site-Preparation Equipment in North Central British Columbia, 2nd ed. B.C. Ministry of Forestry and Lands, Victoria, British Columbia.
4. Drew, T.J., 1988. Managing white spruce in Alberta’s mixedwood forest. In: Samoil, J.K. (Ed.), Management and Utilization of Northern Mixedwoods. Information Report NOR-X-296, Northern Forest Centre, Canadian Forest Service, Edmonton, 25–40.
5. Vegetation control by manual and mechanical means in Alberta boreal forests;Ehrentraut;For. Chron.,1990