Columbia subject headings:
Academic freedom--United States--History--20th century.
Anti-communist movements--United States--History.
College teachers--Political activity--United States--History--20th century.
Communism--United States.
Subversive activities--United States--History--20th century.
Harvard subject headings:
Academic freedom--United States--History--20th century.
Anti-communist movements--United States--History
College teachers--Political activity--United States--History--20th century.
College teachers--United States--Political activity--History--20th century.
Communism--United States
Communism--United States--1917-
Subversive activities--United States--History--20th century
Princeton subject headings:
Academic freedom--United States--History--20th century.
Anti-communist movements--United States--History.
College teachers--United States--Political activity--History--20th century.
Communism--United States.
Subversive activities--United States--History--20th century.