Schoenike, R.E.Brown, B.A.2010-02-092010-02-091963-04-15Schoenike, R.E. and Brown, B.A., (1963), "Variation in Bark Thickness of Jack Pine Seed Sources", Minnesota Forestry Notes 130, School of Forestry, University of Minnesota0099-4332https://hdl.handle.net/11299/57369Published as Scientific Journal Paper Series No. 5103 of the Minnesota Agricultural Experiment Station.en-USforests and forestryMinnesotaresearchReport