Columbia subject headings:
Russia--Church history--20th century--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia--History--20th century--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ. Pomestnyĭ sobor (1917-1918 : Moscow, Russia)--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ. Pomestnyĭ sobor--History--Sources.
Soviet Union--Church history--Sources.
Harvard subject headings:
Russia--Church history--20th century--Sources.
Russkai͡a pravoslavnai͡a t͡serkovʹ. Pomestnyĭ sobor--History--Sources.
Russkai͡a pravoslavnai͡a t͡serkovʹ. Pomestnyĭ sobor.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia--History--20th century--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Soviet Union--Church history--Sources.
Princeton subject headings:
Russia--Church history--20th century--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia--History--20th century--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ. Pomestnyĭ sobor
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ. Pomestnyĭ sobor--History--Sources.
Soviet Union--Church history--Sources.