Title: Rimskai︠a︡ t︠s︡erkovʹ i edinstvo khristovoĭ very / G.F. Kostelʹnik. Kriticheskiĭ razbor rimskogo uchenii︠a︡ o papskoĭ vlasti / V.S. Vertogradov. O primate Rimskago pervosvi︠a︡shchennika / E. Shmurlo
Subjects: Papacy and Christian union, Popes, Primacy