Emerson, J. 1982. The need for action—what is being done in the National Forests of the United States and plans for the future. Pages 50-53 in D. M. Shrimpton (ed.), Proceedings of the joint Canada-United States workshop on mountain pine beetle related problems in western North America. Canada Department of the Environment, Canadian Forestry Service, Pacific Forest Research Centre Report BC-X-230. 87 p.
Emerson 1982
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