Cone crop fluctuations in Scotspine and Norway spruce : an investigation based on the cone counts carried out by the Nationnal ForestSurvey in the years 1954-1962 and on the reports submitted by Forest Service rangers on the cone setting in the years 1909_1961. Om kottsättingens fluktnationder hos tall och grau /
| Hlavní autor: |
Hagner, Stig
(
Autor )
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| Typ dokumentu: | Kniha |
| Jazyk: |
angličtina |
| Vydavatel: |
Stockholm :
Skogshögskolan,
1965.
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