€¦ · diversity of a site (Watson and Renney 1974, Myers and Berube 1983, Rice et al. 1992,...
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€¦ · diversity of a site (Watson and Renney 1974, Myers and Berube 1983, Rice et al. 1992, Tyser and Key 1988, Watson 1980) Knapweed impact is not restricted to only the plant
