Cone sizes of Scots pines Pinus sylvestris in the Highlands of Scotland-implications for pine-eating crossbills Loxia spp. in winter
Author： Summers R.W.
Publisher： Elsevier
ISSN： 0378-1127
Source： Forest Ecology and Management, Vol.164, Iss.1, 2002-07, pp. : 303-305
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