Mueller, Allan G.Hollis, GilbertJohnson, LeeWaldo, MaxErven, BernardJeckel, Russ2019-09-182019-09-181983-6https://hdl.handle.net/11299/2074311 online resource (PDF, 4 pages)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.enReport