Manning, T.W., Koller, E.F. 1953. Minnesota Farm Supply Associations. Saint Paul, MN: University of Minnesota Agricultural Experiment Station. Bulletin 421.
This archival publication may not reflect current scientific knowledge or recommendations. Current information available from University of Minnesota Agricultural Experiment Station: http://www.maes.umn.edu/
Manning, T.W.; Koller, E.Fred.
Minnesota Farm Supply Associations.
Minnesota Agricultural Experiment Station.
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