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New species syndrome in Indian pteridology and the ferns of Nepal
出版 1997主题: “...Ferns-Nepal-Classification...”
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Ferns of Central Himalayas-I (Chamoli and Rudraprayag)
出版 2009主题: “...Ferns-Himalaya Mountains Region...”
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Ecological studies on fern flora of Palni hills (S. India)
出版 1984主题: “...Ferns-Ecology-India-Palni Hills...”
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