Columbia subject headings:
Governmental investigations--United States.
Privileged communications (Libel and slander)--United States.
United States. Congress. House. Committee on Un-American Activities.
Harvard subject headings:
Governmental investigations--United States
Privileged communications (Libel and slander)--United States.
United States. Congress. House. Committee on Un-American Activities.
Princeton subject headings:
Governmental investigations--United States.
Privileged communications (Libel and slander)--United States.
United States. Congress. House. Committee on Un-American Activities