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ouvrage
A. Fraser ; J. Gardiner ; FORESTRY COMMISSION LONDON GBR | London, GBR : HMSO | Forestry Commission bulletin n° 40 | 1967Sitka spruce, Picea sitchensis (Bong.) Carr. is now the species of tree most extensively planted by the Forestry Commission in Great Britain, occupying in 1963 416,000 acres out of a total of 1,752,000 acres. One fifth of this has now reached th[...]