Sucoff, E.I., (1961), "Diagnosing Nitrogen Deficiency in Silver Maple", Minnesota Forestry Notes 108, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Scientific Journal Paper Series No. 4669 of the Minnesota Agricultural Experiment Station.
Sucoff, Edward I..
Diagnosing Nitrogen Deficiency in Silver Maple.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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