Ellefson, P., Skok, R.A. and Miles, W.R., (1965), "1964 Retail Christmas Tree Sales in the Twin Cities Area", Minnesota Forestry Notes 165, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Scientific Journal Paper Series No. 5755 of the Minnesota Agricultural Experiment Station.
Ellefson, Paul V.; Skok, Richard A.; Miles, William R..
1964 Retail Christmas Tree Sales in the Twin Cities Area.
St. Paul, Minn. : School of Forestry, University of Minnesota.
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