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By: Smith, Alan R., - Hennipman, EType: ArticleIn: American fern journalVolume: 68Series:Issue:Date: 1978Page Range: 31--32Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Gay, Honor - Hennipman, E - Huxley, C R - Parrot, F J EType: ArticleIn: The Gardens' bulletin, SingaporeVolume: 45Series: 4Issue: 2Date: 1993Page Range: 293--335Publication Info: Singapore, Govt. Print. Off. [etc.],Subjects: