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Mém. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 6, Seconde Pt. Sci. Nat., vol. 7 (vol. 9:pt.2 (1855)): t. 5 (1855) [9]
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Mém. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 6, Seconde Pt. Sci. Nat., vol. 7 (vol. 9:pt.2 (1855)): t. 5 (1855)