Columbia subject headings:
Communism--History.
Communists--United States--Biography.
Fourth International--History.
Glotzer, Albert, 1908-1999.
Revolutionaries--Soviet Union--Biography.
Statesmen--Soviet Union--Biography.
Trotsky, Leon, 1879-1940.
Harvard subject headings:
Communism--History--20th century
Communists--United States--Biography
Fourth International--History.
Glotzer, Albert, 1908-
Glotzer, Albert, 1908-1999.
Revolutionaries--Soviet Union--Biography
Statesmen--Soviet Union--Biography.
Trotsky, Leon, 1879-1940
Princeton subject headings:
Communism--History--20th century.
Communists--United States--Biography.
Fourth International--History.
Glotzer, Albert, 1908-1999.
Revolutionaries--Soviet Union--Biography.
Statesmen--Soviet Union--Biography.
Trotsky, Leon, 1879-1940.