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periodsmithsonian librariesplantsbonemémoires de l'académie impériale des sciences de st.-pétersbourg. 7e série. ser.7:t.20 (1873)mémoires de l'académie impériale des sciences de st.-pétersbourg. 7e série. ser.7:t.14 (1870)echinodermsdiagrammémoires de l'académie impériale des sciences de st.-pétersbourg. 7e série. ser.7:t.12 (1869)mémoires de l'académie impériale des sciences de st.-pétersbourg. 7e série. ser.7:t.33 (1885-1886)
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