About ethnographic map of European Russia

Keppen, Peter Ivanovich (1793-1864).About the ethnographic map of European Russia / [Op.] Peter Keppen.- 2nd ed.-Sanct-Petersburg: IMP.Rus.geogr.o-in, 1853. -40 p., 1 l.Table.;22. -Bibliogr.in a substrateNote..Electronic Source: PB