Columbia subject headings:
Nationalism--Dictionaries.
Radicalism--Dictionaries.
Right and left (Political science)--Dictionaries.
Harvard subject headings:
Nationalism--Germany--Encyclopedias.
Radicalism--Germany--Encyclopedias.
Right and left (Political science)--Encyclopedias.
Princeton subject headings:
Nationalism--Germany--Encyclopedias.
Radicalism--Germany--Encyclopedias.
Right and left (Political science)--Encyclopedias.