Spurr, Stephen H.2010-01-072010-01-071952-12-15Spurr, S.H., (1952), "Index Cards for Tree Records", Minnesota Forestry Notes 11, School of Forestry, University of Minnesota0099-4332https://hdl.handle.net/11299/56277Published as Scientific Journal Series Paper No. 2901 of the Minnesota Agricultural Experiment Stationen-USforests and forestryMinnesotaresearchReport