-
By: Cordero, P JType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 111Series:Issue:Date: 1991Page Range: 44--46Publication Info: London, British Ornithologists' Club, 1893-Subjects:
-
By: Manosa, S - Cordero, P JType: ArticleIn: The journal of raptor researchVolume: 26Series:Issue: 4Date: 1992Page Range: 235--238Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
-
By: Cordero, P J - Aparicio, José M. - Parkin, D TType: ArticleIn: The journal of raptor researchVolume: 36Series:Issue: 1Date: 2002Page Range: 70--73Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: