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By: Britton, Nathaniel Lord, - Greene, Edward L - Beal, W. J. (William James), - Gruber, Calvin LutherType: ArticleIn: TorreyaVolume: 1Series:Issue: 4Date: 1901Page Range: 41--43Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945Subjects:
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By: Gruber, Calvin LutherType: ArticleIn: American fern journalVolume: 7Series:Issue:Date: 1917Page Range: 67--73Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Gruber, Calvin LutherType: ArticleIn: American fern journalVolume: 7Series:Issue:Date: 1917Page Range: 114--121Publication Info: [Washington, etc.] American Fern SocietySubjects: