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R. Todd Bittner, David J. Gibson, Microhabitat Relations of the Rare Reed Bent Grass, Calamagrostis porteri Subsp. Insperata (Poaceae), with Implications for Its Conservation, Annals of the Missouri Botanical Garden, Vol. 85, No. 1 (1998), pp. 69-80
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Bittner et al. (1998) studied this question.
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