Population trends in British barn owls, Tyto alba, and tawny owls Strix aluco, in relation to environmental change
By: S.M. Percival.
Contributors: British Trust for Ornithology.
Series: BTO Research report -- no. 57
Publisher: British Trust for Ornithology
Published: 1990
Place of publication: Tring, Herts
Language: eng
Number of pages: 129
Subjects: Barn owl -- Great Britain.
Notes: "June 1990."

Includes bibliographical references.