Khalil, Muhammad A.K.2010-02-152010-02-151968-04-15Khalil, M.A.K., (1968), "Variation in Scotch Pine", Minnesota Forestry Research Notes 191, School of Forestry, University of Minnesota0544-3555https://hdl.handle.net/11299/57809Published as Scientific Journal Paper Series No. 6596 of the Minnesota Agricultural Experiment Station.en-USforests and forestryMinnesotaresearchReport