Authors
W.E. Berguson
Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway,, Duluth, USA
B.G. McMahon
Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway,, Duluth, USA
D.E. Riemenschneider
Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway,, Duluth, USA