APA
Roll-Hansen F., Horntvedt R. & Roll-Hansen H. (1997). On diseases and pathogens on forest trees in Norway 1966-1975. Part II. Abnormal formations. Physiogenic diseases. Diseases due to unknown or complex causes. : .
Chicago
Roll-Hansen Finn, Horntvedt Richard and Roll-Hansen Helga. 1997. On diseases and pathogens on forest trees in Norway 1966-1975. Part II. Abnormal formations. Physiogenic diseases. Diseases due to unknown or complex causes. : .
Harvard
Roll-Hansen F., Horntvedt R. and Roll-Hansen H. (1997). On diseases and pathogens on forest trees in Norway 1966-1975. Part II. Abnormal formations. Physiogenic diseases. Diseases due to unknown or complex causes. : .
MLA
Roll-Hansen Finn, Horntvedt Richard and Roll-Hansen Helga. On diseases and pathogens on forest trees in Norway 1966-1975. Part II. Abnormal formations. Physiogenic diseases. Diseases due to unknown or complex causes. : . 1997.
SerieJęzyk: angielski Serie: Meddelelser fra Skogforsk - Norsk Institutt for Skogforskning ; No. 47. 15Szczegóły wydania: 1997.Opis: s. 33 : il. ; 24 cm.ISBN: 
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