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2. Population ecology and conservation of the barn owl Tyto alba in farmlands habitats in Liemers and Achterhoek (The Netherlands);Bruijn;Ardea,1994
3. Mortalité des rapaces le long de l'autoroute Genéve–Lausane;Bourquin;Nos Oiseaux,1983
4. Code of Practice for the release of captive-bred barn owls in Britain,1992
5. Recoveries and resightings of released rehabilitated Raptors;Duke;Journal of Raptor Research,1981