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Author: Janzen, D. H.
Source: Journal of Forestry, Volume 60, Number 1, 1 January 1962, pp. 6-9(4)
Publisher: Society of American Foresters
Document Type: Journal Article
Affiliations: Director, Bureau of Sport Fisheries and Wildlife, U. S. Dept. of the Interior, Washington, D. C.
Publication date: January 1, 1962