Duncan, D.P., Kaufert, F.H. and French, D.W., (1955), "Selected Poplars for Minnesota Plantings", Minnesota Forestry Notes 43, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Sci. Jour. Ser. Paper No. 3374 of the Minn. Agr. Expt. Sta.
Duncan, D.P.; Kaufert, F.H.; French, D.W..
Selected Poplars for Minnesota Plantings.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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