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Stumpage and contract prices of pulpwood in Norway, Sweden and Finland in the felling seasons 1958/59 - 1968/69 and 1969/70
Lauri HeikinheimoSeppo PaananenHannu Vehviläinen
出版Metsäntutkimuslaitos, 1969
URLhttp://books.google.com.hk/books?id=9EL7vgEACAAJ&hl=&source=gbs_api