Robert Moss, G. R. Miller, Production, Dieback and Grazing of Heather (Calluna vulgaris) in Relation to Numbers of Red Grouse (Lagopus L. scoticus) and Mountain Hares (Lepus timidus) in North-East Scotland, Journal of Applied Ecology, Vol. 13, No. 2 (Aug., 1976), pp. 369-377
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Moss et al. (1976) studied this question.
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