Columbia subject headings:
Authors, Russian--20th century.
Freemasons--Soviet Union.
Mysticism--Soviet Union.
Soviet Union--Intellectual life--1917-1970.
Soviet Union--Politics and government--1917-1936.
Soviet Union--Politics and government--1936-1953.
Zubakin, Boris, 1894-1938--Correspondence.
Zubakin, Boris, 1894-1938.
Harvard subject headings:
Freemasonry--Soviet Union--History.
Freemasons--Russia--Biography.
Freemasons--Soviet Union--History.
Rosicrucians--Soviet Union--History.
Zubakin, Boris Mikhaĭlovich, 1894-1938.
Zubakin, Boris, 1894-1938--Freemasonry.
Princeton subject headings:
Freemasons--Soviet Union--History.
Rosicrucians--Soviet Union--History.
Zubakin, Boris, 1894-1938--Freemasonry.