From the history of paper money in Russia

Kaufman, Ilarion Ignatievich (1845-1915 / 16).From the history of paper money in Russia / [cit.] I.I.Kaufman, Horde.prof.And [MP].Spb.un-ta.- St. Petersburg: Type."North", 1909. - [8], 292 p.;22. -.Electronic Source: PB