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A. J. Gray, R. Scott, The Ecology of Morecambe Bay. VII. The Distribution of Puccinellia maritima, Festuca rubra and Agrostis stolonifera in the Salt Marshes, Journal of Applied Ecology, Vol. 14, No. 1 (Apr., 1977), pp. 229-241
Gray et al. (Fri,) studied this question.
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