Spurr, S.H., (1952), "Computing Tree Volume Graphically", Minnesota Forestry Notes 8, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Minnesota Agricultural Experiment Station Scientific Journal
Series Paper No. 2895
Spurr, Stephen H..
Computing Tree Volume Graphically.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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