Christensen, Jonas J.2016-04-262016-04-261922-05https://hdl.handle.net/11299/179665University of Minnesota Masters thesis. May 1922. Major: Plant Pathology. Advisor: Dr. E. C. Stakman, Arthur Henry, C. O. Hamblin, Dr. F. H. Stevens. 1 computer file (PDF); 72 pages.enPlant PathologyStudies on the Parasitism of Helminthosporium Sativum P. K. & B.Thesis or Dissertation