Dosdall, Louise2016-03-092016-03-091922-05https://hdl.handle.net/11299/178099University of Minnesota Ph.D. dissertation. May 1922. Major: Agriculture. 1 computer file (PDF); 55 pages.enAgricultureFactors Influencing the Pathogenicity of Helminthosporium Sativum Pammel, King and BakkeThesis or Dissertation