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by Logan, K. T.
: CANADA DEPARTMENT OF FORESTRY, 1962

Series: Canada Department of Forestry, Technical Note NO.121.

Edmonton : Forestry Canada, 1991.

by Von Althen, F. W.
Sault Ste. Marie, Ont. : Great Lakes Forest Research Centre, Canadian Forestry Service, Dept. of the Environment, 1981.

Series: Information report (Great Lakes Forestry Centre) ; 0-X-332

by Perala, Donald A.
St. Paul, Minn. : U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, [1995].

Series: Research paper (North Central Forest Experiment Station) ; NC-321

[Edmonton] : Forestry Canada, 1992.

by Young, Harold E.
Orono, Me. : Maine Agricultural Experiment Station, University of Maine, 1965.

Series: Technical bulletin (Maine Agricultural Experiment Station) ; 20

by Pitt, D. G.
Ottawa : National Research Council of Canada, 1999.

by Weingartner, D. H.
Maple, Ont. : Ontario Tree Improvement and Forest Biomass Institute, Ministry of Natural Resources, 1985.

Series: Forest research report (Ontario Tree Improvement and Forest Biomass Institute) ; no.111