Columbia subject headings:
Communists--Soviet Union--Biography.
Revolutionaries--Soviet Union--Biography.
Trotsky, Leon, 1879-1940.
Harvard subject headings:
Communists--Soviet Union--Biography
Revolutionaries--Soviet Union--Biography
Trotsky, Leon, 1879-1940
Princeton subject headings:
Communists--Soviet Union--Biography.
Revolutionaries--Soviet Union--Biography.
Trotsky, Leon, 1879-1940.