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Item Blackleg and soft rot of potatoes(North Dakota State University, 1990) Gudmestad, Neil C.; Secor, Gary A.; Lamey, H. ArthurItem Ring rot of potatoes(North Dakota State University, 1990) Secor, Gary A.; Gudmestad, Neil C.; Lamey, H. ArthurItem North Dakota Potato Wilt Survey - 1977(North Dakota State University, 1977) Gudmestad, Neil C.; Zink, Richard; Otazu, VictorItem Guidelines for Seed Potato Selection, Handling and Planting(North Dakota State University, 1997) Secor, Gary A.; Gudmestad, Neil C.; Preston, Duane A.