Columbia subject headings:
Hermits--History.
Orthodox Eastern Church--History.
Soviet Union--Church history.
Harvard subject headings:
Hermits--History.
Holy fools--History.
Holy fools--Soviet Union--History.
Orthodox Eastern Church--History.
Orthodox Eastern Church--Soviet Union--History.
Russia--Church history.
Soviet Union--Church history.
Princeton subject headings:
Hermits--History.
Orthodox Eastern Church--History.
Soviet Union--Church history.