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3. Action thresholds for potato leafhopper on potatoes in Minnesota;Cancelado;J. Econ. Entomol.,1979
4. Traditional and modern crop protection in perspective;Glass;Bioscience,1978
5. The Ecology of Pod Sucking Bugs of Cowpea (Vigna unguiculata Walp.) with Special Reference to Clavigralla Species and Their Host Range in Nigeria;Hammond,1983