Henry, D.G., (1973), "Foliar Nutrient Concentrations of Some Minnesota Forest Species", Minnesota Forestry Research Notes 241, School of Forestry, University of Minnesota
Minnesota Forestry Research Notes
Published as Scientific Journal Paper Series No. 8243 of the Minnesota Agricultural Experiment Station.
Henry, Douglas G..
Foliar Nutrient Concentrations of Some Minnesota Forest Species.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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