Rychkov, P.I. History Orenburg (1730-1750).Orenburg: ed.Orenburg.lips.Stat.com., 1896.

Rychkov, P.I.Orenburg history (1730-1750) / Ed.And with a note.N.M.Goyyar, secretary com.- Orenburg: ed.Orenburg.lips.Stat.Com., 1896. -[4], 94, [1] p.: table .. -Bibliogr.in the text and subscription.Note..I. Goyard, N.M..1.Territory (collection).Electronic copy source: PBOriginal storage: St. Petersburg State University