Yön linnut
Subtitle: kirja Suomen pöllöistä
By: Pekka Helo.
Publisher: Luontokuva P. Helo Ky
Published: 1984
Place of publication: [Kajaani]
Language: fin
Number of pages: 240
Subjects: Owls -- Finland.; Birds -- Finland.
Notes: Bibliography: p. 238-240.