The food, population fluctuations and ecology of the long-eared owl (Asio otus (L.)) in Norway
By: by Yngvar Hagen
Series: Meddelelser fra Statens viltundersøkelser -- 2. ser., nr. 23
Publisher: A.s. Kaare Grytting
Published: 1965
Place of publication: Orkanger
Language: eng
Number of pages: 43