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Revealing past needle density in <i>Pinus</i> spp.Jalkanen, Risto; Aalto, Tarmo; Kurkela, Timo · Scandinavian Journal of Forest Research · 1998
Needle retention and needle loss of Scots pine in recent decades at Thetford and Alice Holt, EnglandJalkanen, Risto E.; Aalto, Tarmo O.; Innes, John L.; Kurkela, Timo T.; Townsend, Ian K. · Canadian Journal of Forest Research · 1994