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By: Mehra, P N - Bir, S.S. (Sarmukh Singh),Type: ArticleIn: American fern journalVolume: 50Series:Issue:Date: 1960Page Range: 276--295Publication Info: [Washington, etc.] American Fern SocietySubjects:
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By: Gill., B S - Mehra, P NType: ArticleIn: Journal of the Arnold ArboretumVolume: 55Series:Issue: 4Date: 1974Page Range: 663--677Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects:
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By: Mehra, P N - Sareen, T S - Khosla, Prem KumarType: ArticleIn: Journal of the Arnold ArboretumVolume: 53Series:Issue: 4Date: 1972Page Range: 558--568Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects:
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By: Mehra, P N - Sareen, T SType: ArticleIn: Journal of the Arnold ArboretumVolume: 54Series:Issue: 3Date: 1973Page Range: 412--418Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects: