Columbia subject headings:
Fascism--Europe--History--20th century.
Fascism--Germany--History--20th century.
Radicalism--Europe--History--20th century.
Radicalism--Germany--History--20th century.
Harvard subject headings:
Fascism--Europe--History--20th century
Fascism--Germany--History--20th century
Radicalism--Europe--History--20th century.
Radicalism--Germany--History--20th century.
Princeton subject headings:
Fascism--Congresses.
Right-wing extremists--Congresses.
Totalitarianism--Congresses.