Hanson, Lowell D.Springer, Clement D.Farnham, Rouse S.Robertson, Alex S.Allred, Evan R.2014-12-302014-12-301966-02https://hdl.handle.net/11299/16882342 pages; includes photographs, drawings and maps. This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.en-USNewsletter or Bulletin