Columbia subject headings:
Civil rights--United States.
Communism--United States--1917-
Communism--United States.
Public opinion--United States.
Harvard subject headings:
Civil rights--United States
Communism--United States
Communism--United States--1917-
Public opinion--United States
Princeton subject headings:
Civil rights--United States.
Communism--United States--1917-.
Public opinion--United States.