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Item Biological control of leafy spurge(North Dakota State University, 1981)Item Status of program for release of Oberea erythrocephala in Wyoming for the control of leafy spurge - 1983(North Dakota State University, 1982)Item Preferential grazing of leafy spurge by sheep(North Dakota State University, 1981)Item European rust fungi pathogenic to collections of leafy spurge from the United States (summary only)(North Dakota State University, 1982)Item Sweetclover competition with leafy spurge(North Dakota State University, 1982)