Person, Hubert L.2016-04-262016-04-261922-06https://hdl.handle.net/11299/179734University of Minnesota Masters thesis. June 1922. Major: Entomology. 1 computer file (PDF); 19 pages.enEntomologyAn Ecological Study of the Larch Sawfly (Lygaeonematus erichsonii Hartig)Thesis or Dissertation