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By: Raim, Arlo J. - Cochran, William W. - Applegate, Roger D.Type: ArticleIn: The journal of raptor researchVolume: 23Series:Issue: 2Date: 1989Page Range: 49--52Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Graber, Richard R. (Richard Rex), - Cochran, William W.Type: ArticleIn: The Wilson bulletinVolume: 71Series:Issue: 3Date: 1959Page Range: 220--236Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Graber, Richard R. (Richard Rex), - Cochran, William W.Type: ArticleIn: The Wilson bulletinVolume: 72Series:Issue: 3Date: 1960Page Range: 253--273Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Applegate, Roger D. - Berger, Daniel D. - Cochran, William W. - Raim, Arlo J.Type: ArticleIn: The journal of raptor researchVolume: 21Series:Issue: 2Date: 1987Page Range: 68--70Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: