Columbia subject headings:
Baltic Provinces (Russia)--Church history.
Pontificium Institutum Orientalium Studiorum.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia (Federation)--Baltic Provinces.
Harvard subject headings:
Baltic Provinces (Russia)--Church history.
Pontificium Institutum Orientalium Studiorum.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Baltic provinces.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Russia (Federation)--Baltic Provinces.
Princeton subject headings:
Baltic Provinces (Russia)--Church history.
Orthodox Eastern Church, Russian, in the Baltic provinces.
Rome (City)