Institution: | U.S. Forest Service, North Central Forest Experiment Station, 1992 Folwell Avenue, St. Paul, MN 55108, U.S.A, email;Wisconsin Department of Natural Resources Bureau of Research, Department of Forestry, University of Wisconsin, Madison, WI 53706, U.S.A.;Wisconsin Department of Natural Resources, P.O. Box 220, Park Falls, WI 54552, U.S.A. |