Browsing by Author "Johnson, G.R."
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Host specificity of Spurgia esulae Gagne (Diptera: Cecidomyiidae), a gall midge introduced into the United States for control of leafy spurge (Euphorbia esula L. "complex")
Johnson, G.R.; Stazi, M.; Pemberton, R.W.; Pecora, P. (1991)