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By: Craighead, John - Craighead, Frank C., (Frank Cooper),Type: ArticleIn: The Wilson bulletinVolume: 52Series:Issue: 4Date: 1940Page Range: 241--248Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Craighead, Frank C., (Frank Cooper), - Dunstan, T CType: ArticleIn: Raptor researchVolume: 10Series:Issue: 4Date: 1976Page Range: 112--119Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects: