Columbia subject headings:
Communists--Soviet Union--Biography.
Ri︠a︡zanov, D. B.
Harvard subject headings:
Communists--Soviet Union--Biography
Dissenters--Soviet Union--Biography
Political persecution--Soviet Union.
Revolutionaries--Soviet Union--Biography
Ri︠a︡zanov, D. B.
Soviet Union--History--1917-1936.
Princeton subject headings: