Columbia subject headings:
Harvard subject headings:
Communism--Soviet Union
Jewish politicians--Soviet Union--Biography.
Jewish socialists--Soviet Union--Biography.
Revolutionaries--Soviet Union--Biography
Socialism
Soviet Union--History--Revolution, 1917-1921.
Steinberg, Isaac Nachman, 1888-1957.
Princeton subject headings:
Communism--Soviet Union.
Socialism.
Soviet Union--History--Revolution, 1917-1921.
Steinberg, Isaac Nachman, 1888-1957.