Winton, L.L., (1964), "Phenology of Normal and Forced Microsporogenesis in White and Black Spruce and Their F1 Hybrid", Minnesota Forestry Notes 153, School of Forestry, University of Minnesota
Minnesota Forestry Notes
Published as Scientific Journal Paper Series No. 5513 of the Minnesota Agricultural Experiment Station.
This study was made possible by a grant from the Charles K. Blandin Foundation,
Grand Rapids, Minnesota.
Winton, Lawson L..
Phenology of Normal and Forced Microsporogenesis in White and Black Spruce and Their F1 Hybrid.
St. Paul, Minn. : School of Forestry, University of Minnesota.
Retrieved from the University of Minnesota Digital Conservancy,
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