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By: Williamson, Francis S. L.Type: ArticleIn: Journal of the Washington Academy of SciencesVolume: 62Series:Issue:Date: 1972Page Range: 88--102Publication Info: Washington [etc Washington Academy of Sciences]Subjects:
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By: Johnston, David W - Williamson, Francis S. L.Type: ArticleIn: The Wilson bulletinVolume: 72Series:Issue: 3Date: 1960Page Range: 248--252Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Norris, Robert A - Williamson, Francis S. L.Type: ArticleIn: The Wilson bulletinVolume: 67Series:Issue: 2Date: 1955Page Range: 78--83Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: