Pauley, S.S., (1956), "Natural Hybridization of the Aspens", Minnesota Forestry Notes 47, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Scientific Journal Paper Series No. 3496 of the Minnesota Agricultural Experiment Station.
Pauley, Scott S..
Natural Hybridization of the Aspens.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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