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Keppen, Petr Ivanovich
(1793-1864).
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Preliminary information on the number of residents in Russia, by province and county, in 1851: Based on the data of 9 people. census and other testimony / presented by Peter Keppen. - St.Petersburg: type. Imp. Acad. Sciences, 1854. - 17 with. ; 22 centimeters
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ББК 60.721.11 ББК 63.3 (2) 521.2-1ю13
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Copy source: RSL Location on map of originals: RSL
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