Media type: E-Article Title: Development of needle retention in Scots pine (Pinus sylvestris) in 1957?1991 in northern and southern Finland Contributor: Jalkanen, Risto; Aalto, Tarmo; Kurkela, Timo imprint: Springer Science and Business Media LLC, 1995 Published in: Trees Language: English DOI: 10.1007/bf00192193 ISSN: 0931-1890; 1432-2285 Keywords: Plant Science ; Ecology ; Physiology ; Forestry Origination: Footnote: