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St. Petersb. Bull. (5)
Bulletin de l'Académie Impériale des Sciences de St.-Pétersbourg. 5. Série. Izvestiya Imperatorskoy Akademii Nauk. Russian.
Journal
http://www.mathnet.ru/php/archive.phtml?jrnid=im&wshow=contents&option_lang=eng
Formerly: Bull. de St. Pétersb.
Continued as: Leningrad, Bull. Ac. Sc. (6)
No longer indexed. Journal abbreviations vary in sources
