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By: Walter, Hartmut, Type: ArticleIn: The journal of raptor researchVolume: 31Series:Issue: 4Date: 1997Page Range: 384--385Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Illinois. Dept. of Conservation. - Walter, Hartmut, Type: ArticleIn: Revista chilena de historia naturalVolume:Series:Issue:Date: 2006-12-01Page Range:Publication Info:Subjects:
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By: Walter, Hartmut, Type: ArticleIn: Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, BonnVolume: 18Series:Issue:Date: 1967Page Range: 216--220Publication Info: Bonn, Das Forschungsinstitut,Subjects: