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Item A Summary of Leafy Spurge Control with Herbicides in North Dakota since 1963(North Dakota State University, 1985) Messersmith, Calvin G.; Lym, Rodney G.Item Survey for Spotted Knapweed in North Dakota(North Dakota State University, 1985) Lym, Rodney G.; Bultsma, Paul M.Item Cost Effectiveness of Leafy Spurge Control During a Five-Year Management Program(North Dakota State University, 1985) Messersmith, Calvin G.; Lym, Rodney G.