Dorow, NorbertEngel, N.E.Guither, Harold D.Hadley, Herbert D.Hildreth, R.J.Houch, J.P.Jones, Bob F.Robinson, B.H.Rose, GordonWoods, FredWyckoff, J.B.2019-06-262019-06-261978https://hdl.handle.net/11299/203917This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.enReport