Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy >
Vol.6, No.2 >
Studies on the Cenozoic Plants of Hokkaidô and Karahuto : II. Salvinia Natans ALLIONI fossils subsp. Nov. from Karahuto and S. formosa HEER from Hokkaidô
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