Columbia subject headings:
Harvard subject headings:
Conservatism--Bibliography.
Princeton subject headings:
Conservatism--History--19th century--Sources.
Conservatism--History--20th century--Sources.
Right and left (Political science)--History--19th century--Sources.
Right and left (Political science)--History--20th century--Sources.
Right-wing extremists--History--19th century--Sources.
Right-wing extremists--History--20th century--Sources.