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By: Kelloff, Carol Lynn, - Skog, Judith E. - Adamkewicz, Laura - Werth, Charles RType: ArticleIn: American fern journalVolume: 92Series:Issue:Date: 2002Page Range: 185--213Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Barrington, David S. (David Stanley) - Haufler, Christopher H - Werth, Charles RType: ArticleIn: American fern journalVolume: 79Series:Issue:Date: 1989Page Range: 55--64Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Stevens, Richard D. - Werth, Charles RType: ArticleIn: American fern journalVolume: 89Series:Issue:Date: 1999Page Range: 221--231Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Werth, Charles R - Haskins, Melanie L - Hulburt, AkkeType: ArticleIn: American fern journalVolume: 75Series:Issue:Date: 1985Page Range: 128--132Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Eshbaugh, William Hardy, - Werth, Charles R - Wilson, Thomas KType: ArticleIn: PhytologiaVolume: 45Series:Issue: 4Date: 1980Page Range: 356Publication Info: Bronx Park, New York H.A. Gleason and H.N. MoldenkeSubjects: