Columbia subject headings:
Conspiracies--United States--History--20th century.
Kennedy, John F. (John Fitzgerald), 1917-1963--Assassination.
Public opinion--United States.
Harvard subject headings:
Conspiracies--United States--History--20th century
Kennedy, John F. (John Fitzgerald), 1917-1963--Assassination.
Public opinion--United States
Princeton subject headings: