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By: Sontag, Walter A., Jr.Type: ArticleIn: Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, BonnVolume: 30Series:Issue:Date: 1979Page Range: 367--379Publication Info: Bonn, Das Forschungsinstitut,Subjects:
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By: Sontag, Walter A., Jr.Type: ArticleIn: The Avicultural magazineVolume: 108Series:Issue: 4Date: 2002Page Range: 154--165Publication Info: Ascot, Berkshire, etc Avicultural Society, etcSubjects:
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By: Sontag, Walter A., Jr.Type: ArticleIn: The Avicultural magazineVolume: 107Series:Issue: 1Date: 2001Page Range: 10--21Publication Info: Ascot, Berkshire, etc Avicultural Society, etcSubjects: