Books by Petr Nikiforovich Sobolev
Uprochenie soi︠u︡za rabochikh
Uprochenie soi︠u︡za rabochikh i krestiʹi︠a︡n v pervyĭ god proletarskoĭ diktatury
Uprochenie soyuza rabochikh i
Uprochenie soyuza rabochikh i krest'yan v pervyi god proletarskoi diktatury
Rabochiĭ klass-vedushchai︠a︡ s
Rabochiĭ klass-vedushchai︠a︡ sila Okti︠a︡brʹskoĭ sot︠s︡ialisticheskoĭ revoli︠u︡t︠s︡ii
V.I. Lenin ob istoricheskom op
V.I. Lenin ob istoricheskom opyte Velikogo Okti︠a︡bri︠a︡
Istorii︠a︡ Velikoĭ Okti︠a︡brʹs
Istorii︠a︡ Velikoĭ Okti︠a︡brʹskoĭ sot︠s︡ialisticheskoĭ revoli︠u︡t︠s︡ii