Thompson, LeifGipp, WaynePurkhiser, E. DaleHankes, RayEsbenshade, Kenneth L.2019-09-182019-09-181983-10https://hdl.handle.net/11299/2074321 online resource (PDF, 2 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