Columbia subject headings:
Eschatology--History of doctrines.
Orthodox Eastern Church--Doctrines--Soviet Union--History.
Orthodox Eastern Church--Soviet Union--Doctrines--History.
Harvard subject headings:
Eastern churches--Doctrines.
Eschatology--History of doctrines--19th century.
Orthodox Eastern Church--Russia--Doctrines--History.
Princeton subject headings:
Eschatology--History of doctrines--19th century.
Theology, Eastern Church--Soviet Union.