Blar i NIBIO Brage på forfatter "Roll-Hansen, Finn"
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On diseases and pathogens on forest trees in Norway 1966-1975. Part II: Abnormal formations. Physiogenic diseases. Diseases due to unknown or complex causes
Roll-Hansen, Finn; Horntvedt, Richard; Roll-Hansen, Helga (Meddelelser fra Skogforsk;47.15, Report, 1997)