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By: Downs, R JType: ArticleIn: Journal of the Washington Academy of SciencesVolume: 54Series:Issue:Date: 1964Page Range: 112--120Publication Info: Washington [etc Washington Academy of Sciences]Subjects:
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By: Smith, Lyman B. - Downs, R JType: ArticleIn: Proceedings of the Biological Society of WashingtonVolume: 73Series:Issue:Date: 1960Page Range: 245--260Publication Info: Washington Biological Society of WashingtonSubjects: