Browsing by Author "Kopp, D.D."
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1983 Sunflower Midge Survey
Kopp, D.D.; Busacca, J.D.; Kopp, D.D.; Busacca, J.D. (North Dakota State University, 1984) -
1984 Sunflower Midge Survey
Kopp, D.D.; Busaccaand, J.D.; Kopp, D.D.; Busaccaand, J.D. (North Dakota State University, 1986)