Reference:Christensen1930a
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Verbatim text: Christensen, C. 1930. The genus Cyrtomium. Amer. Fern J. 20: 41--52.
Author: Christensen, C.
Year: 1930
Title: The genus Cyrtomium
Journal: Amer. Fern J
Volume: 20
Pages: 41–52