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By: Molčanov, L AType: ArticleIn: Izviestiia Imperatorskoi akademii nauk = Bulletin de l'Académie impériale des sciences de St.-PétersbourgVolume: 3Series: 6Issue:Date: 1909Page Range: 69--74Publication Info: S.-Peterburg, Akademiia, 1894-1917Subjects: