Google Scholar October 9, 2025 by jlamprecht https://scholar.google.com/scholar_lookup?&title=Studies%20on%20Polymyxa%20graminis%2C%20n.%20gen.%2C%20n.%20sp.%2C%20a%20plasmodiophoraceous%20root%20parasite%20of%20wheat&journal=Canadian%20Journal%20of%20Research&volume=17&pages=38-51&publication_year=1939&author=Ledingham%2CGA
