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By: Whittier, Dean P. - Pant, D D - Nautiyal, D D - Misra, D RType: ArticleIn: American fern journalVolume: 75Series:Issue:Date: 1985Page Range: 18--18Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Pant, D D - Verma, B. K.Type: ArticleIn: PalaeontologyVolume: 6Series:Issue:Date: 1963Page Range: 301--314Publication Info: London, Palaeontological Association, 1957-Subjects: