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↑Takahashi, Masaru «Occurrence of Trichosirocalus horridus (Coleoptera: Curculionidae) on Native Cirsium altissimum Versus Exotic C. Vulgare in North American Tallgrass Prairie». Environmental Entomology, 38, 2009, p. 731. DOI: 10.1603/022.038.0325.
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