Authors: Gray, Gerald J.; Ellefson, Paul V.
Source: Northern Journal of Applied Forestry, Volume 6, Number 1, 1 March 1989, pp. 6-9(4)
Publisher: Society of American Foresters
Document Type: Journal Article
Affiliations: Department of Forest Resources, College of Forestry, 110 Green Hall, University of Minnesota, 1530 N. Cleveland Avenue, St. Paul, MN 55108
Publication date: March 1, 1989